Well "stunts" I don't know, but I can do quite a few tricks on my BMX. Like I can do a bunny hop, a wheelie (on my mountain bike), front wheelie, 360 peg, and the thing where you turn your handle a full 360 turn.
And I'm sorry for your friend hybrid, but I don't think you should judge anybody else but your friend for his own mistake. Not everyone is as careless as him, at least wear some damn armour (gear).