23 year-old forward Kristian Jensen knocked out Lucas Bjerre Rasmussen, who landed on the ice .
Rasmussen was helmetless, and pretty much defenseless .
Rasmussen’s head fell from the force of the blow to the ice, losing consciousness .
The diagnosis at the hospital was a severe concussion.
Jensen has apologized for the incident on the Frederikshavn White Hawks website.
He’s since been charged for the incident.
Flip the Page to See the Video: