The local group Dysfuntion was getting New Orleans warmed up for the annual influx of Jazz Festival fans when one of the annual festival's best known Rockers jumped on stage with them on Bourbon Street. Dysfunction member Adam Haines told WWLTV that it's not unusual for fans to get excited enough to jump on stage with them during certain songs, but having Steven Tyler do it when his band broke into Walk This Way took everyone by surprise Thursday night (5/3).