ok... just jumping in here to defend trampoline and squash. squash has as much right to be in the olympics as any other raquet sport, and trampoline is akin to gymnastics in a way.
seriously... a sport where it's normal to perform triple flips with three or more twists can't compare to bowling or ballroom dancing.
i don't think quake will ever be in the olympics though. it has to be at least a remotely physical activity to qualify for that.