Reminds me of an episode first semester my sophomore year. On a Wednesday I'd had a chilli dog for lunch at the South Dining Hall. That evening I had a 7 PM tutorial. I wasn't feeling all that well, but I went.
The prof noticed that I was looking pale and lethargic. She offered use of her bike so I could swing by the Infirmary on my way back to my dorm – Holy Cross. I chose to walk (more like stagger) since I didn't trust my stability on a bike. I bypassed the infirmary to just get to my bed. I spent the night, and much of the next day, sitting on the "throne" with a garbage can in front of me while I "evacuated" every solid and liquid in my body.
When I finally felt strong enough (and devoid of bodily "stuff") I trudged to the Infirmary. They had a large box filled with little white bags of pills. Their story was that it was a "stomach flu" hitting St. Joseph's County, IN.
The odd thing was that it only effected those of us who had the chilli dogs for lunch at the South Dining Hall. I haven't had a chilli dog since.
It did make for an interesting pre-game kegger once I'd had three beers with no food for three days.