I was joining one of my GMs other regular games for a few sessions, I don't normally play with the second group, but their game takes place in a shared world so my character can join them.. I'm a shapeshifter with Accidental Change, most of them are powersuit types.
We're attacking a wharehouse with magic weilding thugs, after subduing the outside guards we're deciding what to do next when a sniper opens a window and shoots me, doing body triggers the Accidental Change and I burst into an Unkindness of Ravens (3 dozen birds or so).
GM: You get shot and take 2 Body.
Me: *rolls Acc.Chng.* I explode into a bunch of ravens.
The Healer: I CAN'T HEAL THAT!!!
They didn't know, up to that point, that I could shape shift at all... it was one of those surprise moments you can never repeat.