Booth came down hard on his head and was out .
Booth was going through the neutral zone with his head turned away from Richards and made a back pass at the same time Richards engaged for what should have been a clean hit .
Booth came down hard on Booth 's head and was out .
Booth was going through the neutral zone with his head turned away from Richards and made a back pass at the same time Richards engaged for what should have been a clean hit .