Agree with that as a strong possibility, Steve. Having had several people I've dealt with try to wrangle out of cuffs or get their hands out front, the most popular method seems to be the -scrunch up and get your feet through your arms- method (for lack of a better term!)
At the apex, you would be pretty well folded up and if you got stuck that way with the handcuffed hands on the bottom of your feet, I can see the asphyxiation occurring.
But up around the neck? Weird...