Pasta.
It was a traumatic event.
I used to quite like pasta, until my mum force-fed me an entire 500g bag. I was awake for two days straight (I can't even pull an all-nighter) and stuck in an awkward position which would reduce the horrific cramps only slightly.
Needless to say I've never had a plate-full of pasta since.
Also, I cannot stand the smell or taste of McDonalds, if you didn't already hate me.