@Chris Wallace
LET'S DO A HEADCOUNT...
It's also not humanly possible to move when anchored by both arms. But again, we have THIS guy to thank for that.
It always amused me when Todd McFarlane bashers point to what is "humanly impossible". It's equivalent to the common belief, bees shouldnt be able to fly, or an aerodynamicist saying, "the stealth bomber shouldn't be able to fly". Neither Archangel nor Katar Hol should be able to fly; add Vulture and Killer Moth to the realistically improbable.
In Jimbo Salgado's version of Archangel, three sets of wings are required; in Jim Lee's drawing, he's shot like an arrow; Steve Lieber Hawkman is flapping his arms instead of his wings; Graham Nolan's Hawkman is missing the kite string; Ditko's Spiderman obviously was dropped from a Helicarrier (he coulda used some of McFarlane's webs, it would seem), or maybe his armpit webs are wings; Killer Moth belongs in a kindergarten play; (err, wrong Bumblebee) but, he was a VW bug and his chest (top) is flat; wingsuit designed for humanoid flight (shockingly, no hero looks like this... Banshee in the movie perhaps).
Maybe I can hate on these artists on those grounds. IMO, comics are about suspending belief; I would think it makes McFarlane one of the better artists at allowing us to do so. In the 80's, McFarlane's covers caught your eye on the shelf. Love him or hate him.
Moreover, if humans couldn't do this, there would be no Cirque du Soleil.
So obviously, it's not a stretch that McFarlane's Spidey can.