1) I got into an exam late, drenched in rain water, and got penalised for not immediately handing in my phone at the door (I think I got a 2:1 though)
2) I once forgot all my pens to an exam and had to use a pen I picked up on the floor, which broke too (I still got a 1st - it was actually my highest mark ever at 74%)
3) I once finished an exam in half the time and drew a comic on the back of my question sheet, which the invigilators were very collectively amused by when they found it
4) I once went out every single night before my last exam because I was feeling so utterly hopeless for it, yet I still got a 70%
5) I was once in an exam where a fat girl was so heavy that she broke her chair
6) in GCSE, after an exam all the girls cried at the end thinking that they had all failed, that was kinda funny
edit: oh yeah, and in my first year of uni I didn't even turn up to my last exam
my friend once went to an exam high on MDMA - he failed it
my sister's friend once went to an exam drunk and had to be taken out