False Grip on straight bar Muscle Up

False grip on the straight bar Muscle up is equally as important.
When doing MU's on the rings you do the false grip to set yourself up for the dip, that way you have no need to change grip mid way through the movement. This will also allow you to push better when in the second part of the movement. The same is true for the bar or even more practical a wall. Usually people that are good at this will do it so quickly you wont see it, but always pay attention to detail. The primary step to this movement is moving one arm first, but ideally you will want to kip and do both at the same time.
good luck and happy muscle uping!