Remember too that people get get caught hard and even ko'ed when they practice head movment the opposite way to whats going on, or getting fully read the second time.

That happens if you think that one pattern of fast head movment will fool someone into missing; Specially twice!

More danger if its done with planted fixed feet instead of moving to an area that you can hit him with both hands and he can only reach you with one.!

There is safety in head movment when its combined with foot and body placement around certain attacks and certain defences; for positioning for seeking openings when moving out or moving in.

Not many fighters move in agressivley bodily but with arm or glove defence first, then use this type of hed /body movment to flow around their reaction and then be in prime position to attack.

Its not taught or practiced that way around often but can work and can disrupt their timing when it counts the most.

Think them out (the possibilities to you and to the opposition);

know them deeply.

IF theres a risk that you find during a move that your practicing, check that risk with a glove as you move past it or through it into your opening etc.

Thats why what Donnie said about visualization is so right.

Knowing what to do and why you do it (only) at certain times and putting that into your own style through thinking ,shaodow boxing ,then take it into sparring.