BT said immediately after the tackle. ie live on air, that Walsh deliberately hit his head on the ground after the tackle.Also, the ball gets caught under him, creating a pivot point, as Jordon Lewis suggested.
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Then he wanders through the change rooms talking to all the guys, including Walsh like he's their' best mate.
It's time that CH7 got rid of both BT and Richo. Neither of them can remain unbiased during a broadcast and continually ramble on during live play.
Both are 'nuff, 'nuff commentators.