Jack notices Charles over the top attempt to hail the cab. Figuring that he's more than got the job in hand (and a bit worried that the cab driver might just drive away, worried about what kind of freak he is about to pick up) Jack watches the alley behind them, nervous that the ... things... might somehow escape and lumber after them.
Gomez:[sblock]If Jack sees the cab stop anywhere but right next to Charles, he is going to be suspicious that some creeps might pop out and try to harm them. If the cab pulls right up, he wont be so alarmed as anyone inside of the cab would be at a disadvantage of confinement in that spot.)[/sblock]