Dear blood-cooler,
If you're going to squirt out whatever hormone it is that keeps our muscles from moving when we dream we're moving, it doesn't really do any of us any good unless you actually fall asleep instead of a) lying there thinking thinky thoughts and not feeling rested and b) being quite annoyingly aware that our damned nose itches!
Hmph.
-- the rest of the body
P.S.: What's up with this bit where the online resources say the effect usually only lasts a few seconds and just feels like longer, but a clock within view and the number of buses I hear going by both tell me that it really was more like twenty five minutes?