***click on link for vid ... ~~~~~~~~~~~~~~~~~~~~~~~~~ George Clooney owes Sandra Bullock a dress! And an expensive one at that. Bullock recounted on Friday's Tonight Show with Jay Leno a prank played on her by her longtime friend and Gravity costar that resulted in Bullock's dress "disintegrating." Bullock explained that she and Clooney were at a dinner party when he tricked her into jumping in the pool – alone. "I went to the bathroom and came out and there was George and someone else with just their pants on going, 'We're gonna go in the pool,' and I was like, 'Really?' " she told Leno. "And so I held their hands and on the count of three, and in slow motion I see Nicole Kidman with a stack of towels ... and I jump, and they let go, and I go in the pool." "Oh, you were the only one in the pool?" Leno asked. "Yeah. But the sad part was I wore this cute little lace dress that I paid a lot of money for, and as I got out, it started disintegrating." Bullock also told Leno why she's never dated the famous prankster. "I think we're probably the only two that haven't dated in the business," she said. "I think it's probably because we're a little too similar." When Leno asked Bullock to explain what she meant by "similar," she coyly replied, "In all the disturbing ways."