The one on the left is laughing maniacally, while the one on the right was supposed be frightened, but instead it looks like it's going, "Ewww, your mouth is full of ants!"
Also, while I was cleaning up my yard to make sure that it didn't kill any trick-or-treaters, the same stupid joke kept going through my head, over and over again:
(in a fake British accent, because I heard it at the Ren Faire)
Q: What's long, brown, and sticky?
A: A stick!
Like I said, it's stupid. It was, however, fitting considering how many sticks were lying around fron the last wind-storm.
Anyway, Happy Halloween, everyone!