You get yourself a bike. You start riding, it's not that hard, which is cool. You don't forget how to ride a bike, eh.
Then you get to something little more than a slight gradient against a tiny breeze and suddenly you can barely make any headway. The muscles in your legs are burning and a little kid whizzes past you on their bmx (with none of those fancy gears your bike has) not even breaking a sweat.
I think it's going to be a while before I can ride anywhere useful - unless it's downhill