By way of The End of the Universe: a physicist, Sidney ­Perkowitz, a professor of physics at Emory University, prayerfully suggests that writers, especially screenwriters, violate physics no more than once per script. Dude, are we supposed to FTL ourselves to a distant galaxy and then use picks, shovels and Winchesters to kick out the space aliens there? Oh...we are. Okay, noted.

Especially egregious and offensive was Angels and Demons, according to this related Guardian (UK) article:

"The amount of antimatter they had [to blow the Vatican to Kingdom Come] was more than we will make in a million years of running a high-energy particle collider," said Perkowitz. "You can't contain it using an iPod battery."

That offends even me. They could've used flashlight batteries or a car battery. Sheesh. (And I like Tom Hanks, but isn't there someone else to play professorial adventurers (who is not Sean Connery)?)

Seriously, folks, I like mundane SF (another term badly needed), which doesn't violate any present laws of physics. Those stories are closer to home and have more realistic protags and bad guys, rather than the Gothic figures we're grown accustomed to. But I liked Angels and Demons and Avatar, too, even though my BS meter pegged the red zone several times in each.

A humble suggestion to Professor Perkowitz: watch a few adventure movies. It is not uncommon to see someone leap from a roof down a couple of stories and manage to grab onto a ledge, or leap from speeding car roof to speeding car roof...etc. Don't get me started on video games....