Here's an interesting movie to real world fact. Spider-Man's webs could be very real. According to a mathematics professor, it can be done.
Emory professor Skip Garibaldi says that Spider-Man's silk has a definite tinsel strength of 120 pounds per square milimeter. And that's the very similar strength of spider silk in nature and the strength of steel. If you can't do math, all you need to know that it is super strong.
Spider-Man uses long enough strands to swing from building to building and its more than enough to get him in a comfortable glide. The silk will not snap. So could his web stop a speeding subway car? It's possible as well, and all it requires is five tennis balls' worth of silk. That may not seem like a whole lot but according to Garibaldi, that's a lot.
Talk about suspending reality in movies. This is actually possible. [Open Culture]