Six Flags Over Texas celebrates 50 million riders on the classic Shock Wave roller coaster with a ceremony featuring a ribbon cutting, giveaways and special behind-the-scenes tour. We also show off the quick construction progress taking place for the return of Daffy Duck Bucket Blasters and the new Sylvester & Tweety Pounce and Bounce. Six Flags Over Texas is also celebrating Spring Break through March 17 with live entertainment, decor and specialty food items.