Three words people....
FATASS FEAR FACTOR
Obviously, they would need to PC the episode name, but top ten reasons, and the best things to keep in mind are:
1. It's not hard to find stunts that are especially challenging for large americans.
2. Yeah, big fat black chicks are TV friendly, but everybody else is ridiculously funny when fat.
3. Who has ever seen fat people compete in athletic events? (even the special olympics has buff retards)
4. The jiggling, oh god, the jiggling.
5. Did I mention the jiggling?
6. Fat chicks don't need silicone to have huge "tracts." (Always a winner on TV)
7. Pig Intestines are quite frankly, no match for the actual pigs.
8. Like a train wreck, you hate yourself for watching, but you can't look away.
9. Even though they can't, they'll try to conquer a tall building in a single swallow, in hopes of a cupcake.
10. NBC can save some dough by making the prize 50,000 twinkies. (or whatever convenient sponsor comes along, I mean really, any junk food will do, better yet, TrimSpa, that marketing department obviously has no shame)