(catherine listing more ideas that will cause broken bones) i could finish building the night vision monocular that i have parts for and go ride a bike in complete darkness
it's a shame that breaking bones can have permanent consequences or i'd have mine broken more often

@whitequark

I wonder how many broken bones are caused by DST each year (because clocks are sometimes hung up somewhat high).

@whitequark I did this with a thermal camera. Although it wasn't complete darkness, just a small part of a park without any lighting