Cool game my friend linked me last night...
http://www.rawkins.com/games/do/index.html
Try and score as many points as you can in 2 mins by doing various jumps and rolls out of the water. I've had three goes, my best score so far being 39,719. Haven't managed to do a tail slide yet...not sure how, though it tells you in the "How to play" thing...
Edit - My highest score now 77,199, owing to a long string of "Nice entry" jumps, which meant I leapt progressively higher out of the water and was able ot do more tricks

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Edit 2 - 90,379 now! And I found you get a "Gullable" bonus if you happen to hit a seagull

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Still haven't done a tail slide, but I'm having fun getting huge combos atm

. Although I think the highest of high scores on the total high score table is about 27 million or something

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Edit 3 - 104,406!