Tret: parkour (free running) dog from the Ukraine!
When I watched this, my two-year-old started squealing and laughing "Mama, that dog flying!" ...And he does! It is amazing.
I don't know if this is the world's greatest testimony to amazing training, too much time on your hands, or the amazing terrier drive...but it is most definitely incredible on all levels!
(Thanks! Eric for the find)
(I just hope George doesn't expect Boomer to start doing this...Betty, on the other hand, has been known to scale a few fences...)