A Brooklyn man terrorized two NYPD cops when he pulled alongside their squad car in Harlem and pointed what appeared to be a weapon at them to show his friends how easy it would be to “shoot a police officer,” authorities said. Unique Johnson, 32, was driving a Chevy TrailBlazer at West 125th Street and Seventh Avenue at 9 p.m. Tuesday when he suspiciously slowed down and pulled up along the squad car’s right side, police said. When the 26-year-old officer at the wheel peered over his shoulder, he witnessed Johnson with his arms extended, pointing what looked like a...