It's similar in recurrence to the one where I'm back in college, and suddently realize it's time for the final exam, but I haven't been going to class.
I even get combinations of these... Like, say, I graduated and can't remember where my dorm room is (yeah, a graduate in the dorms). Then when I get there somehow, my guns are all disassembled and scattered around and mixed with other people's guns. Or my roommate, friends, and other random people are playing with them. And I have to gather them up because I'm moving out.
Then of course I have to take a leak and go from floor to floor trying to find a working bathroom. All while, sometimes, bad guys are involved.