Why does this article read like the robot actually got angry at a spectator. It did not, it does not have that capacity. This was definitely a glaring safety issue and the company should review all its failure modes that show up in public but an ”emotional” response this was not.
When one wants to be picky, we can't be certain about other people's emotions either. A psychopath may not feel any anger when hitting you, or he might be feeling something very different from what a normal person would label "anger".