Inflating steel

Elizabeth Brim and friends doing a steel inflation demonstration at the Fire on the Mountain Blacksmithing Festival. 

The piece is two sheets of steel, carefully welded together around the edges, with a pipe going into a small space in between them. It was heated up in a gas forge, and Elizabeth is blowing it up with compressed air--which you can do because hot metal is a lot softer than cold metal.  
 

Trombone Karaoke

This guy, accompanied by his little sound system, has been honking jazz standards on Main Street for years and years.