How did I not know this is a thing? Apparently fitting mountain bikes with engines and racing them around cart tracks happens. And this is what happens when an electric motor takes on its ICE competitors.
It's not even a race. Between blowing around the rest of the pack at the start line to lapping the backmarkers, the man and his DIY machine had such a massive lead, he decides to "hang back and relax". And he does, right up to the point the checkered flag is out.
The wife's been pestering me to do a tune-up on her bike. Maybe I'll take it a step further.