What type of snake did that man have? I have to say, snakes arent that intelligent when it comes to doing "tricks". If thats what you mean.
(at least thats what I think) (and we're talking about corn snakes right? or snakes in general?)
I think the only training you can give your snake is teaching it how to be docile. For example: Holding it every day (of course nor when feeding) and showing the snake that you mean no harm and all that good stuff. But other than that...