Penny and I are going to work on jumping a rope one of these days... Well, it's rather warm in Oz these days and we can't be bothered with energetic tricks at the moment. However, Sweet Pea's act would be hard to beat. She holds the canine record for jumping rope the most times in one minute.
However, her other trick is fantastic. She can climb a set of stairs whilst balancing a glass of water on her nose. I came across the link at Spluch, a general-interest blog. Here's Sweet Pea doing her tricks. The water-balancing trick begins at 1:56 minutes.