Foosdude, The Snake, Rollover, Monkey, all names for the same shot. Mastering this shot depends on the player, I have seen some guys pick this shot up and shoot it in tourney play within months of learning. If learning it is what your after I suggest picking up loose balls from all angles of the table and practicing setting the pitch on the pin of the ball. It is critical in execution and follow thru of scoring consistently with the snake. When pinned in the forward position the toe of the man needs to be about half of the ball (ie:) to keep from loosing behind or in front of your man. Practice using your 32 man very slightly kicking the ball up in toe position. If it were me I would start out shooting straights with the goalies up to give you the feel of recoil (also imperitive in executing this shot) Start out using a grip on the handle or you will have rash on your wrists, I put the handle (where it tapers to the front end) on the part where your wrist meets your hand. Some players have different spots on the handles they like better, play with it and find what feels best. Great Snake shooters can kill both push and pull side with ease off the wiggle or the walk. Start out shooting dominant to one side Pull or Push. Once you have the toss correct then kill both sides. Shorts, Longs, Straights. don't give up on the shot it's devastating on defence. Good examples of great snake shots, Tony Spredeman (do not try to copy his grip it is impossible), Billy Pappas, Ryan Moore, Stayce Fowler has a good rollover. Watch some video's i suggest Inside Foos, I learned a TON from just picking up suttle passes faints, and tells.
Good Luck Hope this helps.
Snake