Cart Coaster

Have you ever noticed that shopping carts come up several times during the show? I remember an episode when Perry pushes Doofenshmirtz around in one and in another episode Doof was pushing Perry in one around a supermarket or something.
Anyways this just a silly picture. I was testing out a new style and playing with colour and shading.

I really want to ride around in a shopping cart right now.

Doofenshmirtz and Perry belong to Povenmire and Marsh