Swash is correct, I have found. I DID do my 'due-diligence' back when I was a fledgling Romeo, and practiced til I got it down-pat.
Now, I get one of two responses-
1. Hey! Nice job. you got that thing off one-handed... (with internal thoughts that 'hey, he has done this before, and just might know what he is doing...)
Or...
2. Hey! WTF. You got that thing off one-handed! (with internal thoughts that 'hey, he has done this before, and just might know what he is doing... the bastard.)
The pinch-and-release (I was delighted to see that you Brits use the same term as I do) ain't that friggin' hard, guys.