OK, I don't want to kill my pup, but I'd like to teach her to play dead. Basically, I want to point at her and say "Bang" and have her roll onto her back with her legs in the air and remain motionless. I suppose rolling her eyes into her sockets would be too much to ask. Any tips on how to approach this? I'm pretty sure I can get her to roll onto her back, but how do I go about getting her to stop squirming around and panting? I want dead, not mildly wounded. Certainly someone has taught this basic skill. Any tips on how to break this down?