I was enjoying the view of Crysis 2 and shoot the water with only 1 bullet, JUST 1, to see some splashing effects and to my surprise the framerate greatly decreases from 60fps down to 29-35fps. Now, is this a performance bug? using 2xHD 6950 2gb in crossfire.

link here: http://www.youtube.com/watch?v=vF-XlnXHV6Y

1x GTX 570 and no frame rate decrease for me... I guess wait for new ati drivers, but everyone knows nvidia is in the lead - even 6990 gets beat by gtx580 on this game.