They Forgot to Pivot
Any loyal viewer of “Friends” would look at this photo and instantly hear Ross yelling “PIVOT!” as loud as he could. Those of you who aren’t as familiar with the reference will have to use their imagination.

Source: Cheezburger.com
Picture four people attempting to get a vast couch up a small staircase, and maybe you’ll understand the idea. While there are few things a slight pivot can’t fix, they might also consider just blowing up the mattress after it’s already inside the tent.