The most puzzling motorist maneuver that comes to mind is when I'm riding well to the right of the road, there's more than enough space for a motorist to pass me safely, the motorist will hold back until I reach a parked vehicle. After I take the lane to pass the parked vehicle, the following motorist will then pass me using the opposite lane, and at times, with oncoming vehicles approaching, making those motorists take evasive actions.
I lost count on how many times that type of incident has happened.
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Prisoner No. 979