Go to any slope that you can only climb with the Orangstand. Get your gun out and run up the slope. When you start sliding, jump and press B. Instead of shooting, you will do the normal A-B move. If you press other buttons as quickly as you can, you will do other moves. You may even be able to get Lanky to do the Orangstand as he holds onto his gun.
Submitted by: Nicolas Daoust