Justin Williams uses the power of his butt to drop Clendening.

That is one solid posterior.

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Mr. Game 7 apparently had a butt of steel.

On Wednesday night Washington Capitals forward Justin Williams delivered a thunderous butt-check to New York Ranger Adam Clendening during the final minutes of the game's opening period.

While it initially looked like Williams was lining up for your standard shoulder check, Clendenning tried to dodge away from the hit and it appears that Williams adjusted to deliver the butt-check.

 Here's a look at the video.