Try playing Drums. It's very Zen trying to not concentrate on any one limb but having all 4 doing different things.
Great Fun!!!
I am left handed and left footed but seem to be right foot dominant.
I had a mate demonstrate this. (Try this at home Kids). Get someone to give you a good shove in the chest to put you off balance and see which foot you naturally step back with to regain your balance. It may surprise you.
As I said before it still took some time to get used to the left foot braking on a Forklift but is Easy as once you get used to it. (20 year driving habits are hard to Brake!) and I only drive cars on the roads and not on the track. (yet) but I can sure see the benefits it may bring in certain situations.