while I don't remember my locker combination and i've never been stuffed in a locker, I have indeed been in my locker,  At Parker High, my locker had no back, you could actually step into the locker and inch your way several feet in either direction along a dark gravel or broken plaster lined tunnel of sorts.  We (fellow classmates and I) took great fun in disapearing into my locker until fear of the unknown (darkness, possible mice or worse) had us frantically tumbling out much to the surprixe of anyone walking down the hall past my locker.  Ahhh, the good old days.