A muscle man's meltdown outside a Southern California gym tests the friendship of two neighbors; a Chicago woman confronts an 11-year-old neighbor who she believes has a gun.

A very public breakup plays out in front of all the neighbors at a Florida apartment complex; neighbors in upstate New York bicker over temporary snow fencing; a mail courier in Houston stands his ground in a street fight.

A teenager in Washington is harangued by a neighbor when he cuts across the man's lawn; two women get into a sidewalk standoff in North Carolina; a man defends his neighborhood by fending off suspected car thieves dressed only in his underwear.

A Utah woman and her neighbor argue over the building's heating; a Brooklyn landlord's boyfriend breaks through a tenant's door with an ax; neighbors in rural Nebraska squabble over the property line dividing their homes.