Verified answer

There's also a saltine challenge where you eat 6 saltines in a minute, a milk challenge where you drink a gallon of milk in an hour and try not to throw up, and a sprite and banana challenge where you eat both and try not to throw up (2 bananas and 1 liter of sprite).

I've done the saltine challenge twice and the cinnamon challenge once, so they're possible. The milk one is the real challenge from my understanding, but I've never attempted it.

Chubby bunny

Salami and peanut butter. Pepperoni and jam. Bologna and artichokes.