Not me, but my younger son as the ability to sleep anywhere and through anything.
When he was 3 we were at Cedar Point and had just gotten back to our trailer. It was after mid-night and he had been going since about 10 am. SIL picked him up and put him in the trailer, he took 2 steps and fell asleep leaning on the cooler that was just inside the door.
When he was 4, he fell asleep watching the fireworks at the Magic Kingdom. Woke up when we moved him to main st. to watch the electrical parade.
He runs hard and then crashes as soon as he stops moving. Thankfully, he has always been good natured and not cranky when tired.