Some do it politely, restrained to their seat. Others leap to their feet and move to an aisle to secure more room for self expression. The detractors who complain about its tackiness always glare — like that will stop it.

No one really knows when or why the Power Play Dance came to be. Some say it began with some fans in the Scottrade Center mocking another fan's moves. Others blame too much Budweiser. At this point, the origin matters little. It seems to be here to stay.

Forward Dmitrij Jaskin was caught on camera pumping his arms earlier this season. Cardinal fans were recently encouraged to make the jerky motion at Busch Stadium when the Blues were on the road. One fan at Scottrade on Tuesday night even introduced his own twist, incorporating The Dab — think Cam Newton — into his PPD.

"If it means we score goals, I'm a fan of it," forward Alexander Steen said of the jig after the Blues netted two more power-play goals in their 6-1 blowout of the Stars in Game 3 of the Western Conference semifinals.

OK, so Steen didn't say the Power Play Dance is the reason behind the Blues' potent power play in these playoffs.