10 finger guillotine help

[mikeffd]

I can't seem to get this move. Here's how I (try to) do it.. please tell me what I'm doing wrong.

I wrap my right arm around my opponent's head, cupping his chin in the palm of my right hand. My other left arm goes under his right arm, with my left hand cupping my right hand. I hold the head like a football.

At this point I squeeze my elbows tight and move my wrists in a upward circular motion. It's hard to describe. I'm trying to block his windpipe.

Anyway, I'm doing it incorrectly. All advise is appreciated.

thanks