Well, if you dig that bike shed deep enough you can line the walls and have some space for an emergency shelter against typhoons. At least that will be an excuse for the missus, as while you are waiting for a typhoon, you can in the meantime turn it into a man cave?
Just a thought here my friend hahaha
Blessings
Haha... thankfully, no typhoons here! Only the danger of the sea walls going down and flooding us!
Hahaha, well in that case a mancave underground wouldn't be a great idea, as water will surely fill it and all of your treasures will disappear Hahaha.
Blessings!