My dog loves the tampoline - jumps up himself (well he is a large dog) but just tends to run around in circles with small bounces - nothing like this bulldog. Brilliant.
Young foxes should be natural trampolinists. They are learning to hunt. Foxes hunt small mammals by waiting for signs of movement in the grass or undergrowth and springing up on all fours, to pounce on the prey ; that's what the foxes in the video are practising, but on a trampoline, for a change.