Lest in descending we reach our ending
* At the end of the workday, sometimes I just want to go immediately from my fourth floor office to my car. But it is importantly to not make the trip all at once. In a way, staircases allow me to take advantage of gravity gradually.
* I could, I suppose, take the elevator. But when I was a freshman in college, I broke my ankle and had to use the elevator many times and grew to despise it. After a few weeks, even with crutches, I was using the stairs.
* As an alternative to a staircase, I might use a parachute jump. But then how would I get back up? I guess that I would need a large and powerful trampoline.