Paranormal Activity has now made 414,233% profit. Made for $15,000 and has currently grossed 65.1 million. And it will probably finish #2 this weekend with another 15-20 million. I'm fully expecting this baby to push over 100 million, which will make its profitability staggering.
By the way, it's passed "The Blair Witch Project" - percentage wise - in profits.