As if you needed another reason to head down to Discovery Green this weekend, here's one more: Dock Dogs! Yes, the time-honored "dog performance sport" of leaping off docks and catching crazy air will be going on all weekend at the downtown park. If you thought the Lumberjack Games were the most ludicrous yet highly entertaining sport you've ever seen, then you haven't witnessed the majesty of Dock Jumping. In this sport, dogs of all......