I was riding my bike along a river side boardwalk that had continuous plastic decking & I noticed when I put my hand near the brake levers I'd get a really decent ESD zap.
I was listening to AM radio, the decking his held to the underlying wooden structure using what looks like stainless screws at ~4" intervals.
As the bike tyre runs over the screw heads it seems to discharge the charge making a nice little 'tuck' noise in my earphones as each screw is passed.
I thought it was kind of neat.