A Canadian driver’s incomprehensible decision to make a sudden and illegal U-turn on a highway in Toronto led to another car rolling over and crashing, injuring at least one person.

The accident was captured on a dashboard camera and posted on YouTube by user Tim G, who said it occurred a little after 2:00 PM last Thursday, May 5, 2016, on Highway 27 in Etobicoke.

“A car in the right lane performed an illegal U-turn, cutting off another car in the fast lane in the process,” said Tim G. on the video’s description. “The cut off car’s speed was in excess of 100km/h (over 60mph), and consequently, lost control of his vehicle after clipping the cutter car’s corner. He then zig-zagged in front of me, rolled up to the east embankment onto its roof, and then rolled back onto his wheels.”

The dashcam driver said that the motorist in the Chevy Cruze sustained minor injuries but was in shock. “I administered minor first aid until the paramedics arrived,” he said.

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