How come horses run around?

Question

How come horses run around?

Answer 1

they can't fit in cars or trucks to drive around

Answer 2

if they ran in a straight line they would run out of room in their corals.

Answer 3

good question, my horse runs around alot lol. to me its pretty much the same reason we run around. we get excercise from it and they almost always look as though they are having an absolute ball with their ears pricked as they do, an exception to this is if they are frightened by something, this is called a flight response as the horse will usually, depending on the breed run 50metres give or take and then stop and sometimes even return to the site of their spook