A dog tumbled 60 feet down a bluff in Point Defiance Park Monday and was rescued by Tacoma firefighters. Its owner was walking Bug, the 13-year-old border collie, in the park — something they do regularly — when the dog got too close to the edge and fell over. Several passers-by got a rope and were attempting to rappel down the cliff themselves to reach the dog when an off-duty Tacoma Fire Department lieutenant spotted them and advised them to wait.