 The group arrives at the nest and Marshall lightly steps through the Pteranodon eggs to retrieve the amplifier, but when he reaches it, it stops broadcasting the soundtrack to Marshall's favorite musical "A Chorus Line".When the eggs begin to hatch, Holly realizes that the music was acting as a sort of lullaby keeping the baby Pteranodons asleep.Marshall, Will and Holly belt out "I Hope I Get It", with Cha-ka inexplicably joining in, displaying an impressive singing voice.