Now, we've seen some clever dogs in our time. (It's part of our job to track them down, you understand.)
But we can't remember ever being as impressed as we were when we first saw this amazing video of Staffordshire bull terrier TreT - aka 'Parkour Dog' - showcasing his mad free-running skillz in the Ukraine. (Thanks to our friends across the Pond at The Huffington Post for the tip-off.)
Not familiar with Parkour? To quote Wikipedia, it's a 'physical discipline and non-competitive activity that focuses on efficient movement around obstacles'. Got that? You can find out more here. Or you could just watch TreT in action.
Apparently, TreT is one of only two known canine Parkour experts in the world - the completists among you may like to know that the other one's called Roxy and lives in Hawaii. And if you want to see some more impressive dog tricks - well, feast your eyes on this little lot...