In the episode "Perfect Castaway", in the beginning Peter says to his friends that help him get fish: "Sorry guys, it looks like I'm gonna have to put you down". Here's what I saw:

1. Peter pulls out a double barrel shotgun, which, if you didn't know, you can only put two shells in. But Peter puts in 4! (2 for each barrel, which is impossible).

2. Peter then cocks the gun and the 2 Portuguese guys jump off the boat. And instead of firing 4 shells off, peter fires 5! How could they miss this stuff!?