**JUMPERS** Would this be safe?

there's no doubt people do that type of thing all the time. the best thing for you to do is ask your friend if that horse has ever done that sort of thing before. if the barrel does roll b/c the horse knocks it then you're SOL. so ask your friend if the horse is comfortable jumping higher than the height of a barrel on it's side, and ask if the horse is good about clearing jumps