George Clooney's prank on Sandra Bullock goes terribly wrong Sandra Bullock & George Clooney Mon-30-Sep-13 19:21 Share this SANDRA BULLOCK had to throw out one of her designer dresses after it started "disintegrating" following a pool prank by GEORGE CLOONEY. The Gravity co-stars were at a dinner party one night when notorious practical joker Clooney and another pal tricked her into jumping into the water. She says, "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?'. And so I held their hands and on the count of three... I jump, and they let go, and I go in the pool... "The sad part was I wore this cute little lace dress that I paid a lot of money for, and as I got out (of the pool), it started disintegrating." Bullock should have been weary of Clooney's actions - the Hollywood hunk is well-known for playing tricks on his co-stars on and off movie sets, so she made the actor call a truce while working on their new space disaster movie because the shoot was too tough for pranks. WENN.com You May Also Like Sandra Bullock raps on TV Sandra Bullock battled depression on set of new movie George Clooney has ANOTHER new girlfriend Become a fan of The Edge on Facebook and on Twitter .