Ah, sure, you're playing Trail of Cthulhu. I'm playing Ashen Stars and Night's Black Agents, both games that involve much more cinematic violence. I completely see a rationale in ToC for capping health at 4 or 6, somewhere around there.
The rule that always drops PCs in my games is when an unarmed PC rushes a gunman; according to the rules the gunman auto-hits and does x3 damage. It's brutal but fun to watch.
One thing that does tweak my "suspension of disbelief" meter is how quickly the medic skill works. It's not a big enough problem to change, though, it just feels a bit weird (or quite possibly I'm handling it wrong).
Interestingly, in Ashen Stars shooting someone with a lethal weapon is a pretty big no-no unless you've got exceptionally good reason (since it can damage your troubleshooter reputation and thus your ability to obtain desirable future contracts) - so most weapons default to a stun setting.
Laws hit Ashen Stars out of the freakin' park.
*SNIP*
I've run a NBA one-shot five times now, with a few people telling me it was one of the best games they'd ever played
Thread Necromancy! Unseen, Unknowable forces must be at work! Don't look too closely!
Unless, of course, you want to give me some encouragement. I'm seriously considering shelling out for Trail of Cthulhu, so if any wants to say "no, wait for xxx" or "DOOO IT" then please go ahead now
Cheers