A man accused of groping a boy during his sixth birthday party tried to escape a Queens apartment by going out the window — but instead plunged four stories to his death.A drunken Edgar Collaguazo, 44, made his doomed dash about 1:05 a.m. Thursday after furious parents called police and locked him in a bedroom of the Jackson Heights apartment, sources said.“If he didn’t have a filthy mind, (he’d) simply stay and face the situation,” the mother of the molested boyCollaguazo’s death capped what began as a joyous celebration at his apartment on 95th St. near 35th Ave. in Jackson Heights. The boy lived with his parents in a rented room inside Collaguazo’s place.