Do you have a hobby that makes people think you're nuts?

purplepoppy
The pictures show part of a large folly of mostly Italian buildings found in an overgrown woodland on a steep hillside in North Wales. They were constructed over 25 years by a guy humping bags of concrete up the slope until he was in his 80s. Unsurprisingly was considered a bit nuts by the locals. There's been over 200 items of various sizes found so far.

My question is do you know anyone with a hobby that people consider obsessive or even label them mad for?
Do you have a hobby that makes people think youre nuts?
Do you have a hobby that makes people think youre nuts?
Do you have a hobby that makes people think you're nuts?
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