Summary
A Delta Air Lines plane carrying 80 people crashed and flipped upside down at Toronto Pearson Airport during a heavy snowstorm after arriving from Minneapolis.
At least eight people were injured, including three critically, one of whom is a child.
All passengers and crew were evacuated, and emergency services responded.
The Transportation Safety Board of Canada is investigating the incident.
Based on one of the clips i saw of the crash, it looked like one of the rear landing wheels breaks. This caused the plane to tilt and skew, and probably caught some heavy side wind, which in combination lead to the roll.
As you say, it is incredible that the injuries were not more severe. Read earlier that only one passenger is still hospitalized, and that their condition is not critical.