Peabody has something of a point.
A gas-engine dragster has a lot of noise, smoke, smell, and vibration that gives a strong warning to driver and everybody around.
As evidenced by the video, the driver fell for the innocent act played by "the quiet killer", a monster battery pack with more stored energy than the nasty piston engine.
These systems are blurring the difference between batteries and capacitors. Rather than take an hour or maybe 7.5 minutes to surrender it's energy, this bike battery gives it all up in five seconds. We have a century of experience in gas engine safety. Systems like this one, in the hands of wealthy rookies, will leave more road kill on the path to progress.