The sensors are inadequate for this particular situation. The problem for the car was that the obstacle was about five feet off the ground. The parking sensors aren&#x27;t adequate to deal with something floating in the air like that, so the car was oblivious to the fact that anything was there. There is a camera that could have seen it, but Summon apparently doesn&#x27;t use the cameras, only the sensors.<p>But with regards to how &quot;humans need seconds, not milliseconds, to react to complex unexpected events&quot;: That actually doesn&#x27;t seem to be a problem in this situation. This human evidently <i>had</i> seconds to deal with it. What appears to have happened here is that the guy somehow accidentally activated the feature, ignored the alert that came up, got out of the car and stood there as the car very slowly edged toward the trailer.