goofy in the head

I have no idea why I feel like I haven't slept in two days. I did sleep last night, though not much the night before, but I'm chugging tea and walking into walls and dropping crap. Usually sleep deprivation makes me cranky and bitchy, but by some odd mental alchemy today I'm goofy and laughing at myself. No idea why, and too tired to try and figure it out. I hope it lasts. I hope I can do it again next time.
I hope I can walk THROUGH the door with the hot tea next time...
Anyone have good ideas for handling exhaustion, other than massive amounts of caffine or getting *gasp* some sleep?