Pervertimento for Bagpipes, Bicycle and Balloons is a satirical work authored by Peter Schickele under the pseudonym P.D.Q.
It is a concerto featuring the aforementioned bagpipes, bicycle and balloons as solo musical instruments accompanied by a string orchestra.
"The tone, though jarring, is not altogether unexpected" in the words of the dust jacket for the original LP.
For the final chord, three helium balloons, attached to pitchpipes, are released from the percussion section behind the orchestra.
The work was first performed at Carnegie Hall and recorded live on the album An Hysteric Return: P.D.Q.