I don't watch the show Dragon's Den, though I've heard of it: potential entrepreneurs pitch their products to a group of wealthy investors in the hope that they will get some capital. The investors -- the dragons -- are blunt when they need to be, and it does make for an interesting show.
... especially when the guy who comes in pitching his wares is an alt-med quack who says his bottle of water will cure everything from pink eye to leukemia to cancer:
Too bad ultradistilled water doesn't cure vulturism. That guy looks pretty unhappy as he left, but he was treated very nicely indeed compared to what he deserves.