I suppose if Spidey and his friends can manage impossible feats of heroism, it’s not out of the realm of possibility that his drawn companions would lounge around in equally impossible poses. But you gotta love the internet for trying (and failing) to recreate them. Just remember, folks, some of these things (including swinging from building to building on webs) should not be tried at home.
However, if you want to see real people model great action poses for a nice touch of realism, pick up a copy of Colossal Collection of Action Poses. And check out the section on women seated for some more likely lounging scenarios.