Agreed on the pain and nightmare of shells only. If you're in the middle of the pack, then it's nothing but getting hit constantly. I had some really bad moments of being hit by multiple shells over and over again, dropping 5 or more places in a few seconds.
Anyway. Results.
I think going from Second place at the end of race three in GP one, down to finishing 5th, set my night. I was so frustrated I just couldn't catch a break after that.