Oversleeping takes on whole definition when the person you are working with is 5 hours (or 14) ahead of you!
Stress seems to make it worse wearing the body down. I have written before that the stress reaction used to make sense. You are on the savanna, a lion pops out of the tall grass and begins chasing you, stress kicks in causing an adrenaline rush, and you bolt into the forest to escape becoming a picnic dinner. The stress is short lived. But ongoing stress (days, weeks, years) beats the dickens out of you! Then add to it that I have been staying up past midnight and waking up with or before the roosters and the body feels run over. I suppose those conditions beg for a collapse. Why couldn’t it have come in two days instead of this morning?!