Bridge Too Far

good morning, herr doktor.
ah, there you are my boy. here. put this on.
what is it?
I am about to prove that people paying close attention to something tend to overlook everything else.
so what am I wearing?
a gorilla suit! you're going to charge across this bridge into a group of gun owners taking target practice.
what?!
if my theory is correct, they won't even see you!
but what if they do?
well, they may shoot you. but they're using only small-bore ammunition. you'll hardly feel a thing!
didn't you have another assistant for this?
yes but he passed away, sad to say.
I'm shocked.
he was never a fast runner. pity.