I think that Yahtzee is right that the flying through air in slow-motion thing is abused in that game. It's like V.A.T.S. in Fallout 3 or that stupid slo-mo thing they do when you knock somebody out in fighting games. Hell, at its core it's even like the annoying ass rolling and making your character hop across the board thing they do in the infinite mario party copies they've made. I think what Yahtzee is trying to say is that any event which slows down the action of a game had better be fucking beautiful and used sparingly. If I were to use this mechanic in a game I would definitely try and put it in a FPStealth rather than a shooter, and the pistols she gets would each have to be manually reloaded. Heres roughly how it'd work if I magic fairies granted me the ability to make video games rather than just complain:
*Generic stealthy hero is sneaking*
*Some sort of guard is alerted, possibly along with other guards*
*The hero must choose to either shoot or hide*
*Hero enters dramatic slow motion gun firing event, some number of bullets are used up*
*Other guards are alerted by the gunfire and come to the area*
*Hero must run, hide or shoot if bullets remain*
I think if your reload time was limited like that than the stealth aspect of a game could be emphasized while still keeping the ability to kill enemies. The thing is that if your gunfire alerts more enemies than you are discouraged from shooting. Killing just one room of baddies could lead to you hiding under a desk three feet from a badly shaven guard praying to whatever god you hold sacred that your shaky hands can load that stupid pistol before he smells you out.
Also, I would like to see a movie that had quicktime events. If the entire audience didn't press a button when commanded it would restart from the previous scene, and every time after your first fail you'd be given an electric shock.