Saturday night in Boston, Brad Marchand took what looked like an intentional knee to the head from James Neal which resulted in a stoppage at 11:06 of the first period.
After the play was whistled, there was a scrum at the other end of the ice involving Brooks Orpik, Kris Letang, Gregory Campbell and three officials.
Shawn Thornton hurried to the scrum, grabbed Orpik by the collar and pulled him to the ice. Thornton then punched the defenseless Orpik in the head at least twice before being restrained by an official.
Immediately, medical staff were called over to tend to Orpik, who laid motionless on the ice for several minutes before being carted away on a stretcher. Watch the full incident below.
Here's another angle:
The reaction on Twitter:
Following the game, the NHL Department of Player Safety announced Thornton will have an in-person hearing, while Neal will have a phone hearing Monday, meaning Neal can be suspended a maximum of five games. Here's Thornton speaking with the media about the incident.