Learn how to walk on water-Magic trick?

hey guys im david and i do magic a lot now. I started to like criss angel a lot now and i want to ask for help. I have seen many people on youtube to perform walking on water which is an lussion that criss angel does and they say that its not hard to do. Please if anyone knows how to do it can you write on my e-mail punk.dave@hotmail.com. Thanks...