VALPARAISO, Ind. (AP) -- A man with a guitar and a megaphone climbed atop a convenience store roof to serenade commuters with his musical protest of high gasoline prices - until police halted the impromptu concert.

Once atop the roof of the Family Express store Monday, and above pumps dispensing fuel at $3.78 per gallon, Jay Weinberg, 29, performed his ditty called "Price Gouge'n."

Dozens of supporters chanted: "I can't afford it. I'm banging on my dashboard. I can't believe they think I'm a fool."

The performance lasted about 15 minutes before three Valparaiso police officers arrived and arrested Weinberg on charges of trespassing and disorderly conduct. Police said he was cooperative.

The crowd, made up of Weinberg's friends and other people who just happened to be pumping gas, continued singing. Then some, including his wife, Danielle, drove to Porter County Jail to bail him out.

Weinberg left the building around 7:30 p.m. and was greeted with cheers.