Being incarcerated for any amount of time must be a deeply disorienting experience - you are literally caged away from the rest of humanity and not treated like a full person. I would imagine this feeling only multiplies the longer you're incarcerated, and being released -- while the ultimate goal, comes with its own form of culture shock.
Keeping up with political shifts, the quickly evolving nature of technology (which truly evolves faster than we can even track), and ever changing slang and fashions is hard enough for us on the outside. So, when you're plunged back into society after ten plus years incarcerated, the adjustment can feel deeply drastic.
A recent Reddit thread asked commenters to share the strangest part of re-entering the world after being locked up for years (even decades), and the answers run the gamut from updates in snack options to our prevalent smart phone culture.