Audio problem: When Benny and the others are looking at the destroyed baseball, when Benny and Kenny are talking their mouths are out of sync with what they are saying.
Audio problem: When Yeah-Yeah goes over the fence, he's panting but his breathing doesn't match his mouth or shoulder movements.
Answer: It's pretty common to use someone's last name as a sort of nickname, especially if the last name is fun to say like "Smalls."
BaconIsMyBFF