^ pull back just a smidge on the slide to see if there is a round in the chamber.
For the record Glocks and XDs have features that negate the need for this (and maybe some other pistols I'm not familar with)
I've also never seen the need to press check and figure, in a defensive situation, if I have time to press check, I have time to drop the mag (which would be easier under stress)
Mal: "If anyone gets nosy, just...you know... shoot 'em. "
Zoe: "Shoot 'em?"