In this dash cam video captured by a truck driver, a car merging onto the highway makes one of the most bone-headed moves we’ve ever seen.

This video was captured by YouTuber Frank Guilbert near St-Jean-sur-Richelieu in Quebec.

In the video, you can see that the dash cammer moves from the right lane into the left lane in order to allow a group of cars to merge onto the highway. However, as the truck moves left, a small black car makes what appears to a U-turn attempt right in front of the semi, forcing the truck driver to make evasive maneuvers in order to avoid the (seemingly inevitable) crash.

The truck driver gives the motorist a heaping helping of airhorn to warn him to think a little more carefully before attempting another brainless driving maneuever.