you asked to see a dirt bike crossing water - here it is

https://www.youtube.com/watch?v=QA2TB_BTR5I

https://www.youtube.com/watch?v=AnyTjURH-_I

It takes 100 mph, a paddle tire and lots of big Cahoonas

Here are some more:

https://www.youtube.com/watch?v=CLpXyIZ9gsM&playnext=1&list=PLE52D3199B46E2C13

And you thought it could not be done.

There is another one where Travis Pastrana rides across a swimming pool but I can seem to find it. If I do I will post it.