I was in SM Cath, with a 60 Pally (before BC). Just as we clear half the mobs, he says 'I need to go to a raid, so I'll just try and kill the boss as fast as possible'.

So he pulls the boss, and 30 mobs zerg him. He then bubbles and continues to hit the boss. His bubble ends, and he dies.

We were all standing rather far away, and laughing our asses off. Needless to say, we didn't complete the instance (no healer/tank)