I'm a writer of children's books, and I'm currently working on one which has a subplot about horses. I was wondering if someone could help me with a plot problem I have.
I'm need a scene in which a teenager plays a prank (which he believes will be relatively harmless) but which results in a horse having an accident which looks extremely serious (falling to the ground?)
Could you suggest something which (a) a child might think would be harmless but which would (b) cause a nasty looking accident? And what would the accident be?
The thing I thought about was marbles on the ground, but I'm not sure that would work.