Semi-auto Mag dumping. My experiences:

22LR: "eeeeeeee!!"

9mm: The resulting grin may last as long as 10 minutes.

5.56/.223: Expect to giggle when you hit empty, grin could last as long as 15 minutes. Cheeks tend to hurt.

12ga: HAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA YESSSSSSSSS HAHAHAHAHAHAHAHAHAHAHAHAHAHAHAAAAAAAAAA

#guns