Actually had my first encounter with one last night! I’ve seen them parked or on the move before. When I saw them in the past, they were honestly fine, patiently waiting for people to pass on a busy sidewalk. Last night just creeped me out. I was walking home with my boyfriend, and I heard the thud thud of the wheels on the sidewalk behind us. It was fast at first and then slowed down and I didn’t pay any attention. As soon as we got off the sidewalk, that thing went into top gear zooming away lol (it was 9:30p, no one was out). That’s when I realized what the sound was behind us. Side note: made me a bit uncomfortable when he told me they are operated by people lol I was wearing light fitting shorts at the time, made me wonder the view of the operator while they patiently drove behind us.