Saw Derren Brown live earlier, quality stuff, but im still slightly skeptical. The real question is though:

Who would win in a fight between Derren Brown and David Blaine?

Not really a fair question cause they arent that similar but their initials are the same so its valid.
Personally i think David would have endurance, but Derren would constantly mind game him and eventually win.

Oh yea and another one, (this one provoked a massive debate among my friends (and i mean FURIOUS shouting at each other) which spread to the rest of my year)

Grizzly bear vs Gorilla

Grizzly bear every time.