Unusual uses of musical instruments

[HammerSandwich]

The trumpet @DonH56 posted reminds me of what Anna Russell said about the French horn:

But if you do happen to have one lying around the house, it does make an awfully smart hat.

 

[Vincent Kars]

Unusual use of paint cans

 

[Neddy]

Nice thread, just want to add RyG to the percussive guitar list:

 

[TheM]

Svetlost središta (or on english, something like The Omphalos Light)
All music is pure improvisation played on the sculptures, acoustic sculptures created by artist Vladimir Labat.

 

[TheM]

This men blew my mind first time I heard this sounds.

 

[Bamboszek]

Post-rock band Godspeed You! Black Emperor is known for using screwdrivers to play electric guitars which sounds a bit like violin.
Here is an example: