How to not peel off the bar?

So how do you swing backwards with a pronated grip and not peel off the bar?

Apply pressure with your wrist, you'll have to practice to get a feel for how much grip strength to apply.

Should you try to flex the wrist at all or leave it neutral?

Don't arch your lower back and stick your head out in the back swing. This is a good start.

Blairbob said:

Don't arch your lower back and stick your head out in the back swing. This is a good start.

Also, you are supposed to regrip in the back swing.

It would be a good idea to get grips though if you want to learn basic skills (aka giants...)