Modern elevators don't typically have hatches in the ceiling. The ones that do aren't "escape hatches" but "rescue hatches" and operate from the outside in. The thought being that finding one's self riding atop an elevator that suddenly starts moving is more dangerous than being stuck inside.

I'm not sure that those were covers, but let's not overlook the definite original song at the end of the episode sung by Trey. Phenomenal.