There are two types of active wrist snapping. The first one is somewhat similar to half hitting or allowing the wrist to open purely passively from prior movement of other body parts. The wrist bends back from hand shaking position as the elbow is being straightened and most of the the plyometric loading of tendons and muscles happens on the upper side of the wrist if the palm was laying on a table. Plyometric loading can be seen in physics terms to be a coil that is being pulled longer thus given more energy potential. When the wrist is being straightened to hand shaking position or to the right of it for hyper spin RHBH the stored energy of bending the tendons and muscles in the wrist and forearm are released. The wrist will whip forward much faster than you could do with just the passive extension incidental opening plus active muscle power driven opening of the wrist.
The other way is shown by Marty Peters at http://discraft.com/vid/html/dg16.html
from 3:20 onward. Here you must fight the passive bending of the wrist to the left of the hand shaking position or what Marty called "breaking the wrist". Unless you tense up all the muscles and tendons during the elbow straightening the wrist will give and bend back. In order to load the tendons and muscles all around the wrist harder than with the first way you need to actively fight the bending with a lot of effort. You probably can't keep the wrist totally straight at first or at all but the attempt helps. The more you fight the wrist bend harder the wrist will fling out to the right once you start to snap the wrist to the right of the hand shaking position. Actively turning the wrist with muscles. This truly creates hyper spin.
Mister Carlsen measured throwers getting up to 600' in Valkyrie era and the best thrower increased spin by about 40 % from wrist opening and disc pivot. Back to front speed increases were impressive as well. You do need to actively open the wrist to get all the distance you can get. Giving you the free lunch of added accuracy and consistency as well.
I have high speed video footage of myself throwing and the shock waves traveling back and forth between the wrist and the elbow are nasty. My forearm increased in diameter by about half at worst. Tendon bounce from properly hard acceleration, timing, body positions and late enough acceleration is hard on the arm. Not everyone can do full power wrist snap safely at first. Warming up fully before you even start to train is a very good idea. The wrist straight to snapped to the right version is harder on the arm because more tendons and muscles are being strained, more power is required to keep the wrist in place, more power is being generated and released in a faster motion and the motion is to an unusual hand position with wrist to the right. This can tear the tendons and muscles easily. Not having any wrist tension allowing the wrist to flap freely far right did hurt the founder of this site bad.
Because going from wrist straight to right is an unusual motion it is necessary to have a lot of flexibility to give yourself a wider margin of error in missing the stopping of the wrist. Which is needed to avoid hurting and quite possibly tearing tendons on the lower side of the wrist. I recommend to start every practice session at less than full power and less than full wrist extension to see how limber you are then. There are a lot of variations between days. If you have lifted a lot of weights prior to snapping your range of motion is limited by stiffer and shorter than normal muscles and tendons. You can easily hurt yourself then.
While passive and active opening or snapping of the wrist simultaneously is essential it is only the first part of the complex subject of wrist onward snapping. Where due to the complexity of required knowledge and stringent timing and muscle power requirements only a few succeed. Especially if they don't have the necessary knowledge, experience from other sports, muscle power, quickness and timing. It should be obvious that learning big snap takes a lot of practice. And don't forget hitting the weights including tendon strengthening and finger squeezing power especially for the index finger, thumb and middle finger. Big snap is earned. Sorry there's no replacement for exercise so there's no silver bullet or shortcut. Failing at any stage can easily limit you to little or no snap permanently. On the other hand knowing everything but not being strong or quick enough to pull this off will also hinder you.
Alright guys should I write more about wrist stopping, timing, which fingers to squeeze, when, how hard, disc pivot and whatnot? Because I think this would be stepping on Bradley Walker's territory of expertise and I don't want to make him feel passed by if he wants to contribute. Brad and Blake should I follow up about those or other topics?
Flat shots need running on the center line of the tee and planting each step on the center line. Anhyzer needs running from rear right to front left with the plant step hitting the ground to the left of the line you're running on. Hyzer is the mirror of that.