I like to enjoy my food slowly, so speed eating challenges do not appeal to me in the slightest!

As for the other type of challenge, the 'eat this huge meal in [x] time' one, again, I like to enjoy my food, and frankly I don't know how someone's stomach could fit all of that in, let alone the consequences afterwards...

I imagine I could probably eat that Jack's challenge one, if I had unlimited time, and plenty of water, and took it reaaally slowly. I wouldn't enjoy it though.