I have that pretty much every time I sleep in late (usually Saturdays). I'll "wake up", then click on my phone, notice it's 6:00, and go back to sleep. About 10

I have that pretty much every time I sleep in late (usually Saturdays). I'll "wake up", then click on my phone, notice it's 6:00, and go back to sleep. About 10 seconds later, I usually realize I never actually woke up, wake myself up, check my phone for real, and notice it's actually noon. It feels very strange.