Well, I did and casued a see-saw like reaction b/c next thing I knew we were both thrown from the raft. My first reaction was no big deal, we will just ride it down like a normal slide. Then we turned a corner and I saw the part of the ride that pulls you uphill (sorta like a rubber material with wheels under it). We had to go over that on our butts. It hurt bad!!! .... My back and butt were a little sore and DBF had to go to first aid and get some ice b/c he banged his elbow.
So the moral of my story is, lift your butt....but not too much!!!