Your username is awesome.

And yeah, one of the non-height things that bothered me was how Spider-Man would recover from the fall. He didn’t have a corpse cushion.

I think I read that book twenty-two years ago, so I might be forgetting some things, but I don’t think the author described his landing. The only two options I could figure out were him grabbing a railing above ground level, in which case he’d surely flip around and slam various parts of himself against stair bits; or he could land at ground level (or wherever the bottom of the stairs was). In the latter case, being a superhero, I’m sure he’d negate the fall damage … But given how narrow the space was described as being, it seems like he’d still be unable to avoid slamming into stair bits.

All that said, in the same book, the villain was described as being of an indeterminate size due to standing completely still. That made even less sense to me, but at least didn’t trigger my fear of heights.