Rabbit hopping, also called rabbit show jumping, just makes me smile. Rabbit hopping is a competition of rabbits hopping over jumps for height or hopping for length, much like horse show jumping.
It started in Sweden, and is now popular in several countries, and is growing in popularity in the US. 4H clubs are adding it to their programs for rabbits.
You can find out a lot more about rabbit hopping at the English version of this Danish site.