Hehe
That wasn't too bad =) I guess doing something is the best way to learn and practise. This is your first flash? It's actually pretty good.
The breakdancing idea was neat. You found a pretty good way to animate that with just using the oldschool sprites. Poor Tails and his engine trouble. You'd think he'd figure out Sonic fell off because of that angle they were flying at O.O;
Anyhow, not bad. =)