An argument at a construction site in Madison this week took a serious turn. Police say 41 year old Armando Flores of Beloit hit a fellow worker in the head and leg with a 2 foot pipe on Tuesday afternoon at the job site on Kinsman Boulevard. Flores claims his co-worker had punched him multple times. He's charged with 2nd degree reckless endangerment. The victim was taken to the hospital, but police say his injuries are not serious.