A few nights ago my three year old son was so tired that he couldn't go to sleep or be a civilized member of society. It was as if he was half human and half beast. I swear he had super human strength. It got so ridiculous that we had to take him for a ride in the car until he conked out. Haven't done that since he was an infant.
I did realize a couple of things though. One, I'm getting too old for this (bleep) and two, I really do admire how he doesn't want to miss a second of anything. I think he feels like sleep is an inconvenience. I hope he holds on to that passion as he grows up.