I just realized I need a helmet.
I've lost couple of pounds (due to food poisoning) and e-scooter suddenly started doing wheelies, and I thought about it... It is just a matter of time before i land on the back of my head and leave brain juice on the curb, and city will fine me for littering which i dont want.

What kind of things i've to look for? I think biggest danger is that back flip can be accelerated, and fact that on e-scooter head is much higher off the ground than on a bicycle.
Top speed is not much, around 30 kmh or so, but that doesn't really matter unless you slide off in the corner and hit a curb or smth.