BUT... I have yet to have one fallover because of noise!
I wish i could say that i too have never seen one fall from the noise but as it is i have seen two deer on the ground with no holes in the body. the first my shot at with a 25/06 at about 10 - 15 feet. half an hour later when i arrive on the wheeler the deer is thrasing around. so i walk up to it to get a closer look. when i realized it wasnt going to die any time soon i wiped out my knife and did him in.
The second was one i shot at 25 yards with my 7mag. it was through some nasty brush but i had a good hole and fired. as i approached the deer lifted his so i put another in him.when igot to looking closer at him i noticed the only mark on him was a slit going cross his front leg just above the knee. the only thing i can figure was i hit the brush. the bullet fagmented and cut his leg but the concusion knocked his socks off.