ER, Season 6

Carter (to Chen):
Yeah, I'm actually pretty surprised to see you around here. I, uh, thought you dropped out of medicine after...

Chen:
I almost killed that patient by leaving a guidewire in his chest?

Carter:
I'm sorry, I didn't mean to bring that up.

Chen:
Oh yes you did, John. But that's okay. And let's face it, it was kind of a low point. But it did force me to face the truth. I was being way too aggressive. Way too much of an overachiever. Always trying to show people up.

Carter:
Well...

Chen:
And way too successful at it. I'd left the patient out of the picture.