Judging from the fact that the individual was standing outside and handcuffed, I'm willing to say that he was already taken from behind the wheel of his car. That part was already accomplished. Now, was he choked to the point of unconsciousness because he was trying to make a mad dash back to the driver's seat of his car?
"I am going to choke you, so you don't swallow anything else. (unintelligible) prevent you from having some kind of OD."
He had already swallowed evidence and may have had more in his mouth.