The operater yelled CUT THE GENERATOR, i guess they were able to cut the generator after spidey saved the girl, thus stopping the crane.
The dance bit, well he WAS in a jazz club, what was he supposed to do? stand on his hands?
And how can you say the plot was nonsense? all of it was based on TAS and the comics, except for the end, actually i can vaguely recall venom doing the same thing on tv in TAS.
After them messing up venom and black suit, i was delighted to see all the other stuff that was in the comics aswell.
I guess you viewed it as just a movie, and not a comic book adaptation.