When the St. Louis-based Ska band MU330 took the M-Shop stage Friday night, the energy in the M-Shop became nuclear as the crowd quickly boiled into a frenzy. The energy poured from the five-some, infecting the audience. About half the crowd became so intoxicated by the performance that they began to dance, mosh and even crowd-surf. It was as if the show was being held at Hilton rather than at the M-Shop.MU330 worked its way through the intense, yet lyrically light-hearted, songs including “Stuff,” “Everyday Christmas” and “Hi, My Name’s John,” a song about a 7th grade boy who had his first rock concert experience at a Less Than Jake show.Front man Dan Potthast, with his exuberant and witty Andy Dick-style personality, took a few moments between songs to interact with the audience. At one point, Potthast invited two members of the audience to come on stage and compete for the chance to play guitar during MU’s next song. The audience selected the winner based on who was better at playing the correct chords to the song.With the winner selected, the loser was awarded a free MU330 CD.”He gets a free CD, but you don’t get anything,” Potthast joked with the winner.Without his guitar, Potthast was now able to interact more physically with the crowd. Moving toward the edge of the stage, Potthast was picked up by audience members and hoisted into the air, all the while singing and encouraging the guest guitarist.During one particularly amusing point in the night, trombonist Gerry Lundquist, formerly of the WWF, tore off his shirt Hulk Hogan-style and twirled it over his head like a Chip ‘N Dales dancer.After a quick intermission, MU330 came back to finish the show with a short, but no less psyched, two-song encore, which ended with an amped rendition of “Hoosier Love.”Earlier that night, with powerful guitars, drums and horns, local ska band Mediocre Superheroes exploded on stage with enough energy to power the city of Ames for a month.On several occasions, Superheroes’ trumpeter, Jim — “the new guy” — jumped off the stage to dance and mosh with spectators. Back on stage, he and the other members of the horn section played “air guitar” and backed up frontman Dunar “9-1-1 man” on vocals during instrument breaks.During one of their songs, the Superheroes incorporated “The Imperial March” from “Empire Strikes Back.” The band also made sure to cover a Grubby Ernie tune as well as Ace of Base’s “The Sign,” adding yet more fun to the night’s show. With the combination of charismatic, fun-loving music, crazy stage antics and tireless audience participation, the night easily lived up to what a rock ‘n’ roll show should be.