Really they do, a motorcycle!
As I said to @Pathfinder the other day, I usually stop if i see a cyclist/ bikepacker on the road and have a chat and share my admiration of what they are doing.
It's funny most of them down play it as nothing and ask if i've seen the guy on the skateboard, or the one pushing the wheelbarrow...and the guy on the unicycle, riding RTW?
HUH! WHAT! Unicycle, seriously...yes seriously, a unicycle - this guy. Fun feature length movie.