The Texecutioners Credit: Photo by John Anderson

Ever wonder what the difference is between flat-track and banked-track Roller Derby? Take this weekend to find out. On Saturday, the TXRD Lonestar Roller­girls (they’re the ones on the banked track) move closer to the 2010 Calvello Cup Championship bout. The Hellcats – 2009 league champions – aim to push past the Holy Rollers for another shot at last year’s silver medalists, the undefeated Cherry Bombs. But don’t take your elbow pads off quite yet: On Sunday, the Texas Rollergirls (the flat-trackers) close out their 2010 home season and warm up for regionals by letting their touring Texecution­ers loose on the visiting Dallas Derby Devils. This bout will also feature an exhibition from the Austin Derby Brats. TXRD Lonestar Rollergirls: Sat., Aug. 21, 7pm (doors at 6). Palmer Events Center, 900 Barton Springs Rd. $15; $13, advance; free for kids under 12. www.txrd.com. Texas Rollergirls: Sun. Aug. 22, 6:30pm (doors). Playland Skate Center, 8822 McCann. $12, advance; $15, door. www.txrollergirls.com.

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The Chronicle's first Culture Desk editor, Richard has reported on Austin's growing film production and appreciation scene for over a decade. A graduate of the universities of York, Stirling, and UT-Austin, a Rotten Tomatoes certified critic, and eight-time Best of Austin winner, he's currently at work on two books and a play.