The prank itself is funny, but doesn't it kinda psychologically hurt the dog when people scream and run away from him? He doesn't know why and feels bad afterwards, or am I wrong? And also, the risk of someone kicking him as a defense reaction is pretty big, wouldn't want to risk my dog's health for a prank. Hope the people shown were involved in the prank, otherwise it's a bad move by the dog owner.
pranksters are lucky someone didn't pull out a 9mm and shoot what they thought was a spider. ha ha ha