One of the benefits of California’s autonomous car regulations——is that collisions with a robot vehicle must be reported to the state’s department of motor vehicles, even if they’re incredibly minor. That’s why we now know that, of the six incidents reported so far this year, two involve humans approaching robot cars and literally attacking them.

That figure was highlighted this week in a brief story by the .

On Jan. 2, a Chevy Bolt EV operated by General Motors’ Cruise driverless car division in San Francisco’s Mission District was waiting at a green light for pedestrians to cross when a man “ran across Valencia Street against the ‘do not walk’ symbol, shouting, and struck the left side of the Cruise AV’s rear bumper and hatch with his entire body,” damaging a tail light, according to a report filed with the California Department of Motor Vehicles.

No one was injured and police weren’t called. At the time, the Cruise vehicle was operating in autonomous mode but a safety driver was at the wheel—the current law .

Three weeks later, another GM car was involved in an incident on Duboce Avenue, when, , “the driver of the taxi exited his vehicle, approached the Cruise AV, and slapped the front passenger window, causing a scratch.” Again no injuries were reported and police weren’t called.

This doesn’t bode well for the future .