NEW: Police officer jumps on top of a bull after responding to a "suspicious" call of a male riding a bull up and down a parking lot. The incident took place in Alliance, Ohio. "Officer Hook responded to a report of a suspicious person riding a bull in the parking lot of Walmart today," the City of Alliance Police Department said in a statement. "When he got to the area, he found the bull and rider in the lot of Tractor Supply Co. in the 2500 blk of W State St. Before you know it, Ptl Hook was up on the bull for a picture." "The bull and his owner were in town passing through for the rodeo in Columbiana (Garwood Arena) this weekend."