WATCH: Actively working truck driver doesn’t know how triangles work

A truck driver got a lesson on the basics of truck driving safety from a passing motorist in this clip.  

In the video, a man in a car is passing by a tractor trailer that is apparently broken down on the right shoulder of the highway. The truck driver has his flashers on, and seems to understand that he is supposed to put out triangles, but he doesn’t quite hit the mark. 

“I don’t think he knows how to use them,” the filming motorist says. “He’s got them propped up against the tire.”

The filming motorist then knocks on the driver’s door and offers him and his apparent co-driver a lesson on how to properly open and set out the triangles. 

The motorist then drives off with a wave, leaving the drivers with their oddly newfound knowledge. 

Watch the almost-unbelievable video below.