As you can see in the video, Labant shoved Webb during a game, causing him to fall and hit his head and neck hard against the boards, rendering him unconscious. Webb has since been dealing with the physical and mental after-effects of the hit.
As Webb pointed out, what's more concerning is that Labant has a history of dangerous play. Despite being a repeat offender, Labant only received a 3-4 game suspension for his actions. He criticized the hockey league and urged them to take stronger actions against players like Labant, who put the safety of other players at risk.