From the article > While the drivers of the stopped vehicles seethed over the demonstration, a red pickup truck with a hulking, empty horse trailer pushed into

From the article > While the drivers of the stopped vehicles seethed over the demonstration, a red pickup truck with a hulking, empty horse trailer pushed into the crowd as its driver placed a handgun on the dashboard, witnesses said, and protesters banged on its hood and threw things at the vehicle as it moved in. This is not some random car that couldn't stop for a reason, nor someone that felt menaced and is panicking in a fight or flight move.