A Danbury gas station owner has been arrested for accidentally firing a shotgun while familiarizing himself with the recently purchased weapon.  29-year old Jeehad Jamal, owner of the Exxon off North Main Street, was charged Monday with illegal discharge of a firearm, reckless endangerment and breach of peace.  Police say the Mahopac man was behind the gas station, in a wooded area facing the highway where drivers exiting westbound saw the shooting.  No one was injured.  Police collected four live shells and a spent shell casing.  Jamal was released on bond for a court appearance next Thursday.