I never noticed that either; thanks for pointing it out!

I've always thought (or wanted to believe, maybe) that Mac's mom and Bloo had a pretty good "hey, there" relationship- just like the kid you sit next to in French class who you chat with while you're there, maybe be partners with once and a while, but don't do anything with after school. But those kids always get annoying after a while, too, so... I guess they wouldn't be that hard (aka BLOO) to kick out. ::)

-Marty :goo:

The prank wasn't the party, the prank was getting Mac into the tutu so he'd be humiliated AT his party. The only one who knew Mac would be in a tutu was Bloo, everyone else thought it would be a normal party--- maybe not on his actual birthday, but a normal party otherwise.

Good eye. I generally don't pay attention to background details when watching the episodes.