The 5 o'clock nap

This is what you get when you:
(1) Wake up for the day at 5:15 a.m.
(2) Spend 3 hours in the blazing sun at the lakefront
(3) Totally, completely skip any sort of nap
(4) And then head out to the hottest playground in all of Chicago in 90 degree weather to run around like a crazy man.

The 5 o'clock nap.