In the 70's [yeah I know ancient history] I rode my roadie all over the west side of Los Angeles. I always carried a chain with a master key lock slung over my head and left shoulder, it made for a great weapon. Many times I had jackasses try to squeeze me into the curb on Lincoln Blvd and evertime I grabbed that loop over my head with my left hand and took dead aim at the front winshield. I cracked many a window and dented lots of sheet metal... picturing a 6'1" 220 pound long haired crazed guy madly beating on a car with a lock and chain still brings a smile to my face