81.   Laughter is very powerful.

82.   Laughter is, above all, a social act, Provine said.

83.   Laughter may be the best medicine, but the jokes about bombs go down like castor oil.

84.   Laughter may not be the best medicine, but it helps.

85.   Much laughter is included.

86.   Most of us realize that laughter is contagious as many have witnessed with the behavior of children in groups.

87.   No filmmaker knows better than Lee how laughter can be the surest avenue into painful and scary truths.

88.   Nonetheless, his children laughed when tickled, suggesting that laughter was an innate reflex rather than a learned, social response.

89.   Now the laughter is deep.

90.   People were laughing, uproariously, and you have to question what that laughter is about.