Saw these on Sky a couple of weeks back, absolutely mental, 4.7 sec 1/4 miles at 250 mph, on water!

http://youtube.com/watch?v=S0wUr0YpJOI

When you see a shot from above when they first go there is an underwater explosion as they dive off the line.

Also when they release the parachutes they go in the 50ft rooster tails meaning they slow down pretty quick!

[Edited on 29/1/2007 by greggors84]