No Laughs from Bruce

Synopsis

Burton and the others worry about Bruce, who has lost his pep and stopped dropping his usual gags and puns. Trying everything to cheer him up, Burton and the others use one trick after another to get Bruce to laugh, but his smile won't return. Eventually, even Ron tries his hand—but Bruce reacts to Ron's joke with violent agitation. Seeing this, Burton and the others set out to find the cause...