Slacklining: The trampoline meets the tightrope

Imagine being on a long, thin, trampoline - only 5cm wide - and walking from one side of it to another, and you have some idea of what is involved in slacklining.

The springy tightrope sport started in the US, and the world record for slacklining is a walk of 306m - but Mike Bushell chose to spring into the sport in a much more modest fashion.