How do you snap off the lip?

oI know i post alot of topics, but that search is just terrible.Ignores my snap 
Anyway i'm having no problem going up and down the wave, but i'm not sure how to snap. Thats when you do a really quick watah! and spray a bunch of water on the top of the wave. like this:

i know how to get up but i dont know how to make tons of spray or to snap i guess, i kinda just flow down lol.
Any tips? i'm strong enough to do it for sure i can squat like 300lbs but how do you do it? How should the arms motion? project? ect.
thanks

Anyway i'm having no problem going up and down the wave, but i'm not sure how to snap. Thats when you do a really quick watah! and spray a bunch of water on the top of the wave. like this:

i know how to get up but i dont know how to make tons of spray or to snap i guess, i kinda just flow down lol.
Any tips? i'm strong enough to do it for sure i can squat like 300lbs but how do you do it? How should the arms motion? project? ect.
thanks