I'm the same way -- every once in a while I'll fall asleep on a weekend around mid afternoon, and sometimes wake up 4 hours later. Then I really feel like yuck

I'm the same way -- every once in a while I'll fall asleep on a weekend around mid afternoon, and sometimes wake up 4 hours later. Then I really feel like yuck for another hour. And I can't fall asleep easily that night either (usually I don't have a problem falling asleep, just not getting interrupted in the middle by the dog wanting to get let out).