Clean the snow off your vehicle. It's a warning many northerners have heard before; but one video taken during a recent winter storm illustrates just how dangerous leftover snow can be.

Rudolph “Rocky” Martinez, 65, from Dodge City, was run over by a semi while helping it navigate through a snow-covered parking lot in Ellsworth. Martinez’s friend says he was selfless and always looked for ways to help others.

The video released by the Chase County Sheriff’s Office shows the block of snow flying off of an oncoming vehicle and hitting the windshield of a truck in Cedar Point, Kansas, on Thursday around noon.

A truck driver suffered minor injuries after his windshield was shattered when a block of ice flew off a passing car.

Shocking footage released by the Chase County Sheriff’s Office shows a block of compacted snow flying off an oncoming vehicle and smashing a truck’s windshield in Cedar Point, Kansas. “Folks, we can all do a little better at cleaning the snow and ice off of our vehicles before traveling,