Maybe someone knows how to ride this thing, because it has no pedals or cranks. Wheelwalk?
No, that is the trailer part. Trailers always add extra wheel(s). The same is true on a bicycle.
It connects to the unicycle like so. You mount and hold that in front of you with your hands! Great way to carry bulky stuff whilst unicycling.
P.S. In the past I have taken my kids to kindergarten by putting them pushchair ()/stroller () and then pushing it, while cycling the unicycle behind. Much quicker than walking. I have reffered to this as my makeshift cargo bike in the past!
Haha! I referred to a wheel barrow as a “perambulatory cargo unicycle” here a few years ago and the first reply took it seriously: Maintenance woes
I am sure that it is a cargo-impossible-wheel (coasting down inclines). However, there is a big design flaw that forces you to choose between the cargo function or the coasting function as you cannot do both at once
Maybe it was invented in some alpine regions to transport goods uphill to remote mountain huts and after work was done for easily coasting downhill into the valleys.