My last marathon I ran with food poisoning.

It was HORRIBLE! I woke up feeling like someone had stabbed me in the stomach. The first 13.1 went well - 1:40.... the next ten... well.... I'll spare you the details, but I wasn't about to crap out (no pun intended). The final 3.1 I felt MUCH better! I managed to finish that one in 4:30. Not my best, but an accomplishment to just finish!