what are some sources of humor in act 1

Another staple of the play is its humorous depiction of class tensions. Lane, the butler, is given his fair share of droll sayings, and even Algernon seems to recognize that the lower class has more power than they seem to: "If the lower orders don't set us a good example, what on earth is the use of them?" But this is not a serious play, and all the conflicts are quickly resolved through humor; when Algernon is upset over his depleted supply of champagne, Lane deflates the discussion of class and turns the topic to marriage.