During a sharp turn, the back end of a bus can pivot out and hit something with the side of the bus behind the rear wheels.
I don't know if this is what happened, but that's how it could happen.
"Absolutely incredible and yet another example of 'things that only happen in SF'.
An MTA bus ran over a man in SF and killed him without noticing. The ambulance takes him to the hospital but he's dead before arriving. The Fire Department then writes a report blaming a random Cruise autonomous vehicle that happened to be nearby for the death, despite no evidence thereof.
Cruise obviously disputes this account, provides video footage to the press and SFFD proving they're correct. Media continues reporting false information and fanning the flames.
A month later it's finally revealed that public transit is the hit-and-run driver that killed the man, and Cruise (ironically autonomous driving technology that would've probably prevented a collision) had no involvement. By this point the media cycle has mostly moved on and people are taking hammers to Cruise vehicles."
“I think SFFD is rightfully worried about robotaxis but this doesn’t seem to be the case. When cameras are recording everything, you can’t just make up facts.” (10 days ago)