Close "The Joker" roller coaster test run at Six Flags Over Texas Six Flags Over Texas shared video of the first test run of "The Joker" roller coaster slated to open later this spring at the Arlington park. WFAA 6:31 PM. CDT March 20, 2017 TRENDING VIDEOS Plano police officer involved in gas station shooting Mother of Fort Worth murder victim demands answers Anna teens killed in crash being laid to rest today Fort Worth tire shop robbed five times 2017 Runoff Elections today Hearing for FWPD officer in Craig arrest set for Tuesday Local father, pizza shop owner thankful for community, fundraiser help Anti-Sharia Law protests outside Richardson mosque Toddler left at HFD fire station doing well Video Shows Rescue of Kala Brown More Stories Officials: Mom left toddlers in hot car to teach a 'lesson' Jun 23, 2017, 8:45 p.m. Verify: Do hormones in milk lead to early puberty? Jun 23, 2017, 9:58 p.m. Why wasn't Amber Alert issued for Kaytlynn Cargill? Jun 23, 2017, 10:29 p.m.