Clever bicycle tube umbrella hack
Most people who lock their bikes up in a big city every day usually just remove the quick release bike seat in favor of a more permanent system in order to keep their saddle out of the hands of thieves. Not this clever individual. Instead of locking the seat in place, why not take it with you, and use the empty tube to hold your umbrella in case of that unexpected rain shower.
This is the type of thing that only a commuter could dream up.