By definition First Person Shooters are supposed to play out in a first person perspective, meaning the player should feel like they're actually pulling the trigger and mowing down the bad guys.
But there's something not quite right about "first person" perspective in FPS games, and as this Hejibits comic by John Kleckner shows the problem is your eyeballs aren't in your chest- they're in your head where they belong.
And not your torso head either, your actual, top of your body on top of your neck head...unless you're a mutant...hey, maybe every FPS video game character is a mutant!
-Via Geeks Are Sexy
http://humour.amulyam.com/images/humour/large/1210/108098.jpg
It's close, anyhow.