Just read in the news that a German guy was hospitalized with life-threatening injuries because he rode his esk8 and it suddenly stopped for no apparent reason. Threw him off the board onto the street and he did not have a helmet (which is stupid I know). It seems like this issue of sudden breaks that throw you off the board is quite common (at least this article is not the first time I heard about it) and we were just lucky that nobody got hurt like this until now.
Please stay safe and wear a helmet!
Edit: Oh and here is the link to the German news