Supreme Court Humor

From the AP:

[Rehnquist] provoked laughter with a comment to an attorney representing famed Los Angeles lawyer Johnnie L. Cochran Jr., who is named in a lawsuit the court is considering. As the attorney began describing a hypothetical scenario in which Cochran was running for mayor of San Francisco, Rehnquist remarked, "I thought he lived in L.A."

Was it laughter or the great sucking-up sound? Only practicing attorneys know for sure.