Its Silicon Valley-based maker, Knightscope Inc., said data from STEVE's "black box," as well as video and tests, showed the unscheduled water stop was caused not by foul play or rain, but by an algorithm failing to detect the uneven surface, resulting in a skid. "...Developing state-of-the-art autonomous technology must be done in real-world environments. It is not commercially reasonable to be developed in constrained laboratory settings," Knightscope said in a statement.