When people call out the trick they're about to not land. Guy at the park goes off on how "this is the best switch 360 you'll ever see! watch this, best switch 360 of all time! right here!", then tries a heelflip on a bank and bails.
This isn't really a peeve.. but some dudes were filming on the stairs. Buddy gets a trick, goes back up, tries something else then says "I'm just gonna try this until he gets his trick." I thought it was an awkward thing to say.
I try to be quiet though, the last thing I want to do is be a prick to another skater who I know nothing about.