It seems possible that this was just a misunderstanding, some could also consider this to be a publicity stunt:

While that could very well be the case, the Promobot adventures so far – set up or not – serve as a good illustration of some very real concerns society will need to address in the near future.

Specifically, what are the laws for robots, both to protect us from them, and vice versa? It might sound a little sci-fi, but the risks as they stand are clearly real, with robots having unintentionally injured and killed people in the past.

Here is a video about Promobot

thanks to Science Alert for the great info