I'd always heard from 3rd and 4th year students to watch your back during clinical rotations, as some people tend to look out only for themselves at the expense of others. I didn't want to believe it (still idealistic and naive I guess) but now that I am an M3 I've had the opportunity to see some of it firsthand. Most has been mild ("forgetting" to tell other students about mandatory meetings, refusing to share copies of old lectures and quizzes, etc.) but I understand from some of my classmates that it's much, much worse in the more competitive rotations like Surgery and OB. And it's the people that you least expect it from! Any other experiences out there? Is this what I'm in for over the next couple of years?