This unusual sporting event is called Fierljeppen in The Netherlands. The long aluminium poles are between 3m and 5m long and have a flat round plate at the bottom to prevent it from sinking into the muddy bottom of the canal. The contestants run and jump onto the pole, then a shimmy to the top of the pole - some with the aid of bicycle inner tubes strapped to their feet - and then vault off to try and land on the opposite bank. A national canal jumping contest is held on August 22 each year. There is no prize except the honour of being the Dutch champion canal jumper.