Unfriend is a 2014 Philippine drama film directed by Joselito Altarejos. The film had its premiere in the Panorama section of the 64th Berlin International Film Festival.
The Echo Sonata for Two Unfriendly Groups of Instruments is a satirical instrumental work written by Peter Schickele under the pseudonym of P.D.Q. Bach, whom Schickele studies as a "scholar".
