I'm watching the second episode of The Big Bang Theory. I'm sorry, but these nerds may lack any upper body strength, but they WILL have a concept of HOW TO GET A BOX UP THE STAIRS. It won't take them several minutes to figure out laying-it-down-and-sliding-it-up. Nor will they get extra stupid when it comes time to turn the corner. If the guy's got string theory on a whiteboard in the living room, he's gonna figure out push-it-to-the-landing-then-flip-it-up. Also, don't-let-go-and-let-it-slide-down.
Sorry, this is past stereotypical geek-aspiness. They're playing these guys are improbably-disfunctional idiot savants.