There was a shocking outbreak of humor in the Democratic race last week. First Al Gore told a decent joke on himself to the New Yorker's Joe Klein and Jane Mayer. "Bill Clinton sees a car going down the street and he says, 'What are the political implications of that car?'" Gore said, with a chuckle. "I see a car going down the street and I think, How can we replace the internal-combustion engine on that car?" But Gore's rival upstaged him. Bill Bradley told reporter Seth Gitell, "When my car drives by, I want people to wave and say, 'That's Bill Bradley's car, and we want to vote for him."