Every trip in a self-driving Waymo has the same dangerous moment. The robotaxi can successfully shuttle you to your destination, stopping carefully at every red light and dutifully following the speed limit. But at the very end, you, a flawed human being, will have to place your hand on the door handle, look both ways, and push the door open.

From mid-February to mid-August of this year, Waymo’s driverless cars were involved in three collisions that came down to roughly identical circumstances: A passenger flung their door open and hit somebody passing by on a bike or scooter. That’s according to an independent analysis of crash reports the company has disclosed to the government, which found that most of the 45 serious accidents involving Waymos were the fault of other motorists or seemingly an act of God. (In one case, a pickup truck being towed in front of a Waymo came loose and smashed into the vehicle.) None were definitively the fault of Waymo’s actual self-driving technology.

Waymo, an AI company that is part of Google, loves to brag about its safety record. In a recent report tracking 96 million miles of fully autonomous rides, Waymo says its cars have been involved in 91 percent fewer accidents resulting in a “serious injury or worse” than cars driven by an average human over the same distance. Experts I spoke with had quibbles with Waymo’s comparisons but agreed that the company has an undeniably strong safety record.