Motley Crue Tommy Lee’s Fiancee “Thought He Was Dead” After Son “Knocked Him Out Cold”

Tommy Lee‘s son hit his father with such force, it knocked him out cold, according to a report by TMZ.

Lee’s son, Brandon, reportedly “lost control” and barged into Tommy’s bedroom, challenging the drummer to a fight. Tommy didn’t fare well and knocked him out cold. The punch so so violent, his fiancee thought he was dead.

Sources close to Tommy said … Brandon went nuts after his dad posted a few pictures of his mom, Pamela Anderson, making funny faces, because he felt it disrespected her. We’re told he texted his dad — who was in bed with his fiancee, Brittany Furlan — from another room telling him to take the pics down.

Tommy shot back at Brandon, asking him why’s he’s upset by this but not upset that Pam accused him of abuse.

At this point, our Tommy sources say Brandon burst into the room, yelling at his dad, and challenged him to a fight, but Tommy refused and told him to get out. We’re told when he got up and went to the door to make Brandon leave … Brandon sucker punched him, knocking him out cold.