Oh my favorite pre-med of them all:
We were sitting out waiting for a class to start and someone was talking about how they have to poke behind the eyes of hamsters or something for research...
Her: This is why I want to be a doctor and could never be a vet because its so sad when innocent animals are hurt. But people, you see, do bad things all the time. I don't care if they're hurt because they probably deserve it.
Another time talking about personal statements:
Me: I'm having a hard time writing my PS
Her: What? How could it be hard? All you have to do is brag about how great you are.