--- title: Dares: cliffs, roofs, tombstoning, railways and saying no — a lesson of Mova's school · trees and pragmatics description: «Dares: cliffs, roofs, tombstoning, railways and saying no», a lesson of the medicine course of Mova's primary school, sentence by sentence with dependency trees and pragmatics. It begins: The same trap waits on cliff edges that crumble without warning, on old roofs with skylights that look solid an --- [Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/school/medicine/75-dares-cliffs-roofs-tombstoning-railways-and-saying-no/) [home](https://md.mova.elamur.ai/free/en/) / [corpora](https://md.mova.elamur.ai/free/en/corpora/) / [school](https://md.mova.elamur.ai/free/en/corpora/school/) / [Medicine](https://md.mova.elamur.ai/free/en/corpora/school/medicine/) / Dares: cliffs, roofs, tombstoning, rai… # Dares: cliffs, roofs, tombstoning, railways and saying no Lesson 75 of the medicine course of Mova's primary school: 15 sentences, each with its syntax tree and pragmatics. The lessons are written for Mova, and their agreed trees are part of Mova corpus 0.4 (CC BY-SA 4.0). How Mova does on its tests: [the lesson at school](https://md.mova.elamur.ai/free/en/school-run/medicine/75-dares-cliffs-roofs-tombstoning-railways-and-saying-no/). - [1](https://md.mova.elamur.ai/free/en/corpora/school/medicine/75-dares-cliffs-roofs-tombstoning-railways-and-saying-no/1/) — The same trap waits on cliff edges that crumble without warning, on old roofs with skylights that look solid and aren't, and on railways, where quiet fast trains need about a mile to stop, the third rail in parts of the south is always live, and overhead wires carry about 25,000 volts that can jump to you without a touch. - [2](https://md.mova.elamur.ai/free/en/corpora/school/medicine/75-dares-cliffs-roofs-tombstoning-railways-and-saying-no/2/) — Dares work because the brain wants to fit in with the group, which makes risky things feel normal, and online videos show the one try that worked, never the people who got hurt; a real mate never asks you to risk your life to prove anything. - [3](https://md.mova.elamur.ai/free/en/corpora/school/medicine/75-dares-cliffs-roofs-tombstoning-railways-and-saying-no/3/) — Saying no is easy to learn: Sophie, dared to lie in the road, grins «Nah, not for me, I'm off for chips, who's coming?», a quick no, a reason, and walking away, and often others follow; and if a friend plans something deadly, telling an adult is not snitching, it can save a life. - [4](https://md.mova.elamur.ai/free/en/corpora/school/medicine/75-dares-cliffs-roofs-tombstoning-railways-and-saying-no/4/) — This closes the safety block, and its rules all fit in one breath: swim between the flags and never go in after anyone (call, tell, throw), never go onto frozen ponds, helmet buckled and ears free on the bike, one at a time on trampolines and in the bowl, and no dare is worth your body. - [5](https://md.mova.elamur.ai/free/en/corpora/school/medicine/75-dares-cliffs-roofs-tombstoning-railways-and-saying-no/5/) — Tombstoning means jumping from piers, cliffs or bridges into water; tides change the depth, and hidden rocks or rubbish lie under the surface. - [6](https://md.mova.elamur.ai/free/en/corpora/school/medicine/75-dares-cliffs-roofs-tombstoning-railways-and-saying-no/6/) — Hitting rock, or even hitting water from high up, can break the back or neck; tombstoning has killed and paralysed people in the UK. - [7](https://md.mova.elamur.ai/free/en/corpora/school/medicine/75-dares-cliffs-roofs-tombstoning-railways-and-saying-no/7/) — Cliff edges crumble, especially after rain, and can be hollow underneath, so you keep well back, even for photos. - [8](https://md.mova.elamur.ai/free/en/corpora/school/medicine/75-dares-cliffs-roofs-tombstoning-railways-and-saying-no/8/) — Old roofs often have skylights and thin panels that break when stepped on, and a fall onto concrete can kill. - [10](https://md.mova.elamur.ai/free/en/corpora/school/medicine/75-dares-cliffs-roofs-tombstoning-railways-and-saying-no/10/) — Railways are only crossed by bridges, underpasses or proper level crossings. - [11](https://md.mova.elamur.ai/free/en/corpora/school/medicine/75-dares-cliffs-roofs-tombstoning-railways-and-saying-no/11/) — Overhead railway wires carry about 25,000 volts, and the electricity can jump to you if you just get close. - [12](https://md.mova.elamur.ai/free/en/corpora/school/medicine/75-dares-cliffs-roofs-tombstoning-railways-and-saying-no/12/) — Many lines in the south of England have a third rail carrying about 750 volts, which is always live (full of electricity), train or no train. - [13](https://md.mova.elamur.ai/free/en/corpora/school/medicine/75-dares-cliffs-roofs-tombstoning-railways-and-saying-no/13/) — In a group, the wish to fit in makes risky things feel normal; this is peer pressure. - [14](https://md.mova.elamur.ai/free/en/corpora/school/medicine/75-dares-cliffs-roofs-tombstoning-railways-and-saying-no/14/) — A short, cheerful no with a reason, then walking away, works better than a long argument, and others often follow the one who says no; saying no to a group takes more guts than following it. - [15](https://md.mova.elamur.ai/free/en/corpora/school/medicine/75-dares-cliffs-roofs-tombstoning-railways-and-saying-no/15/) — Telling an adult about a friend's dangerous plan can save a life, and it isn't snitching or grassing (telling tales). - [16](https://md.mova.elamur.ai/free/en/corpora/school/medicine/75-dares-cliffs-roofs-tombstoning-railways-and-saying-no/16/) — Online challenge videos show the tries that worked, not the people who were hurt, and some challenges have killed children. - ← previous: [Ice on ponds and cold water in winter](https://md.mova.elamur.ai/free/en/corpora/school/medicine/74-ice-on-ponds-and-cold-water-in-winter/) - next →: [Olympiad: body numbers, clocks and scores ★★★](https://md.mova.elamur.ai/free/en/corpora/school/medicine/76-olympiad-body-numbers-clocks-and-scores/) - ↑ back to [Medicine](https://md.mova.elamur.ai/free/en/corpora/school/medicine/)