Walkthoughs on how to decap

Punch/kick uke/guy in the neck works best.

You can try either kicking or punching very hard on the neck.

hmm
u can try this(Sh=shoulder hn=hand)
raise left sh
low right sh
contract both pecs
space x2
low left sh
raise right
grippy hns
space x2
extend both pecs
contract elbows
press p and enjoy (it works on 9.82 and with 30.00 grav !)

relax?

nope holding all e.e

You need to say what the time frames are.

A good technique is to wrap your arm around the neck to pop it off. All you have to do is contract either elbow or elbow+wrist.

This method will work either way...It will also work with aikidobigdojo.tbm dismemberment threshold

The best advice is practice.
It is easier to decap when enemy is in hold state rather than in relax state. Gain speed and momentum and hit the right spot hard. Try limpstyle. It gains more speed and momentum.

Last advice, go to tutorials thread. There are many tutorials there.

The best way for me is to strike the neck with a tremendous amount of force with my feet, and hands. If you kick the head it is harder to get the decap, but before you go anywhere near the neck build up speed and then it will decap just like that. If you hit the neck it doesn't take much force to decap maybe like a speed of 25m/s, so always practice and decaps will become very easy.