CATASAUQUA, Pa. -

Two retiring staff members at Catasauqua High School in Lehigh County got a creative goodbye.

The high school performed the musical "Big River" this weekend. After the last show, current and former students broke into a flash mob in honor of Robert Fahringer and Richard Milne's last show as school employees.

The two men, called the "dynamic duo", have been producing Catasaqua High School's musicals together for 34 years.