According to a video posted on Vin Diesel's Facebook page by Diesel himself, the actor received a call from Universal Studios this morning informing him that "Riddick" is currently number one on the DVD charts. 

How did the beefy action star choose to celebrate? By dancing alone for an uninterrupted seven minutes and 26 seconds, first to Katy Perry's "Dark Horse" and then Beyonce's "Drunk in Love."

Interesting but entertaining nonetheless!