I dunno... I think if I found foxes jumping on my trampoline I would
consider relocating to a house a bit farther away from the forest.  Not
that I'm a city-boy... but that's a little too close for comfort. 
Unless they share the bouncy time and such... then I'm in.  This video uploaded by
on September 19, 2008, shows the playful aspect of these animals:

Looks like they get some pretty good air!  Picture bears trying this...

Ever had any bizarre critters on your trampoline?  Let me know if so!

See more videos here!