Extremely unpleasant to watch.
My thoughts are with his toes.
Boots aren't the problem - lack of assessment & planning is.
He managed to tick at least 6 of Roadcraft's overtaking key safety points (let alone the ones about the right clothing).
Overtaking: key safety points
• Only overtake if you can see far enough ahead to be sure it's safe.• Avoid causing other vehicles (overtaken, following or oncoming) to alter position or speed.
• Before you overtake, assess whether your machine is capable of the overtaking manoeuvre you're planning.• Before starting to overtake, always ensure you can move back to the nearside in plenty of time.• Always be ready to re-assess if a new hazard comes into view.
• Only overtake in situations where you won't come into conflict with other road users and it can be performed legally.• When possible, avoid overtaking three abreast to leave yourself a margin of safety.
• Be aware of the potential dangers when filtering.
• On multi-lane carriageways, only overtake on the nearside if there are slow-moving queues of traffic and offside queues are moving more slowly.
• Never use the hard shoulder for overtaking.
• Consider signalling if it will benefit any other road user. Make sure that your signal is clear and can't be misinterpreted.• Always be patient and leave a margin of safety to allow for errors.