It's all fun and games until you're sitting in a sealed suit filled with Vyroxin Plasma for ten thousand years. And your nose falls off.
Had this idea for a spacefaring astronaut come across the secret to immortality which involved him getting into this suit of viscous alien plasma. He dons the shifting chamber, the fluid fills in...and immobilizes him for all eternity. He is conscious the whole time, thousands of years go by. Ten millennia into his incarceration his nose falls off. Inspired by many things, many artists, and museum jars filled with formaldehyde and specimens.