There is a high probability that Metal Bum will bring a smile to anyone's face.
Here's a brief description from its creators:
A short film on the epidemic of turf warfare between unemployed robots and street musicians in urban America. Down on its luck, an obsolete robot turns to panhandling on the streets. One day it finds itself competing with a skillful street guitarist for precious donations.
FYI - Contains some PG/PG-13 action/violence.
Enjoy!