It is a terrifying thought! On my admission letter from USN, it says you have to get a C in all the pre-reqs that you're finishing up. I'm sure I'll at least get a C in my classes, but I'm still scared of sending in my transcripts with a C because I've got A's in all my pre-reqs up until now. I keep thinking that if I do end up with a C, they'll call me and be like, "you know, we really only were going to accept you because of your outstanding grades and now you've turned in a C, so we're going to rescind your admission." I don't really see how that can happen since it's in black and white right there that you just have to get a C, but I'm just so paranoid. I keep thinking of reasons why they might rescind my admission.