The "wingman" on a City of Tonawanda snowplow was injured when the plow hit an obstruction in the road, causing the plow to smash the window on the truck.
The accident occurred at 8:37 a.m. Friday as the truck was plowing East Niagara Street.
Larry Brennon II, 42, was operating the side plow on the truck, when the plow and wing hit something, according to city police.
"It was some kind of a road obstruction, or impediment in the road," police Capt. Fredric Foels said, adding that section of the street does not have curbs.
The wing plow traveled up and crashed back onto the passenger side of the truck, smashing into the side mirror and shattering the side glass of the truck. The flying shards of glass struck Brennon on his right side, face and neck.
He was taken to Kenmore Mercy Hosptial. where he was treated and released. The driver of the 2008 International plow was not injured.