Back home...and so tired that I slept for most of the day...

I'm not sure why admitting to something like that induces such an overwhelming feeling of guilt...but it does. You feel the need to add qualifying statements like, "I only slept four hours a night for the last three days"...or "I'm conducting a study into the sleep habits of fruit flies" (for anyone who's curious the fruit fly demands ten hours of rest a night and need to sleep more if you keep them awake longer...they're also, presumably, rather pissy the next day as a result).