
"The Jaunt" is a horror short story by Stephen King first published in The Twilight Zone Magazine in 1981, and collected in King's 1985 collection Skeleton Crew. The story takes place early in the 24th century, when the technology for teleportation, referred to as "Jaunting", is commonplace, allowing for instantaneous transportation across enormous distances, even to other planets in the Solar System.
God, that story. Such a simple plot, and yet the existential terror of what it describes is beyond comprehension.
Likewise for every fit 20-something being launched at Mach 5 you'd have 10 octogenarians dying of cardiovascular complications.