When I was 2 years old, I picked up a snail off the ground and tried to eat it. Have it all on video too.
On a more recent note, in my freshman year of high school, me and some buddies decided to find out who could eat the most disgusting combo of food. I ate a bowl that consisted of: horse radish, two week old McDonald's maple syrup, warm mayonnaise (dangerous), flat 7Up, relish, and egg nog. Lol I took a mouth full of it, and couldn't even swallow it, let alone hold it in my mouth. I never knew I had such powerful gag reflexes
I can still taste the taste to this date.