One of the perks of working in animation is that you can find other people who like to paint. Myself and a few friends at the studio go out during lunch for a little plein air painting. The time limit forces us to work quickly, and small. This is a collection of lunch sketches painted directly on an unprimed piece of birch board. They are about 20 minutes each, and feel more like aerobic exercises than paintings.
Also, for those people who like to paint roadside scenery, I recommend bringing a few of these signs along with you to help regulate traffic flow. ;)