[quote=Tyki]
you ever tried to play chess while getting choked the fuck out by an mma fighter? that would be the equivalent....
[/quote]

Not really. When choking, you're applying physical force. While being incapable to breathe is quite certainly disturbing and shocking, unless you're close to suffocation, you'll still be able to think relatively clearly, esspecially if you've been trained to do so. Furthermore, how is your magic supposed to be stealthy if it makes people unable to breathe? I don't know about you, but if I couldn't breathe, I'd notice.