Yeah, not like they had a lot of options at the time anyway, but at least they weren't really in immediate danger! Guy had his finger on the trigger the entire time...
That one scene with the Ruger p90 in Desperado always bugged me, where he slowly chambers the round. Also why I don't carry a gun I'm not comfortable carrying loaded.
- - - Updated - - -
I'm 6' and can conceal just about any handgun. I've carried a 1911 government inside the waistband before. Realistically, it's easier to go with something like a Glock 19, Beretta PX4 Compact, SIG 3200, anything similar. My Unknown Armies character 15 years ago had a pair of STI 38supers just so I could carry around 24X2 rounds...
Intimidating, hard to judge, maybe a 44magnum revolver just for the one-liners. They make some compact stuff like a 329, not sure if GURPS has recoil rules.