Probably a week of sleep
I only got 4 hours each night last week and didn't catch up at the weekend because I am a sleeptard.
( Undulating Tentacles of Love getting fun down to acceptable levels, Wed 27 May 2009, 7:42, archived)

ick.
I think you must be my sleep deprivation twin.
(Poppet some assembly required., Wed 27 May 2009, 7:43, archived)

all self inflicted in my case,
because I'm stupid.
( Undulating Tentacles of Love getting fun down to acceptable levels, Wed 27 May 2009, 7:47, archived)

My body clock is simply weird.
I don't begin to get tired until lights get turned off. So I have been known to stay awake for two or three days straight simply because the lights were on the whole time.
(Poppet some assembly required., Wed 27 May 2009, 7:54, archived)

Maybe your body is deformed?

( WormuIus, Wed 27 May 2009, 8:12, archived)