It's like something out of a romantic comedy (or Blues Brothers)! A reader sent us this video of a flash mob proposal in Washington Square park yesterday, with 50 couples bursting into a synchronized dance to Ray Charles' "Hallelujah, I Love Her So" after the girl says yes. The videographer and his friends clearly knew what was about to go down, with one shrieking "It's starting!" as the music kicks in. Great proposal, or greatest proposal ever?