My primary Skylab memory is the novelty hats you could buy the summer it was descending as a fiery ball of destruction. They each had a big paper spike sticking upwards, making you look like you had been given a German WWI infantryman helmet as a promotional item at a hamburger chain. The text on the hat indicated that the spike served as an early warning system; if Skylab landed on your head, the spike would grant you 0.00003 seconds to get out of the way.