I've eaten some pretty old stuff, never gotten sick from that.. but I had a chef's salad from some cafe at the Luxur in Vegas on the 2nd to last day we were there. I got super-gassy on the plane ride home, then shitted and puked my insides out for the next 12hours. There was nothing else to shit or puke, I literally had shit and puked everything out, but it wasn't enough. No, it wasn't. I had these farts that weren't only loud, but they were violent, and long. I probably could have scooted a quarter across a table with one of these farts. I went to the doctor on the 3rd day, having not eaten anything since the morning of the flight. She said it was probably salmonella or e-coli, not sure, but that my body would get over it eventually by itself.
It was a week of absolute terrible terrible everything. I wish it upon no one.