One day you ended up in a tunnel.  There are times when the tunnel can be mysterious and exciting.  The song takes us through a short journey in a tunnel.  The music is in Concert B flat and 4/4 time.  Be careful with the low brass and percussion sections of the piece, make sure the percussion is the backbone to the music and not over powering.  There are many opportunities to balance with dynamics.  As you come to the clarinet melody of the piece, make sure the low brass and percussion are supporting the melodic line.  As the song builds, pay special attention to the dynamic markings, phrasing, and articulations.