. . .Den you hold your handkerchief by the comer like dis.
COMEDIAN
Vat does that mean?
STRAIGHT
Meet me on the corner.
COMEDIAN
Och, dat's fine. (Takes handkerchief). . . Den if you hold it dis way, dat means (biz.): "Are you on the square?"
This line reads even funnier than many laughs in the act that are bigger, but its business cannot be explained in words. It seems funnier to you because you can picture it. You actually see it, precisely as it is done.
Then the next line blends it into the next point, which is clearly introduced with a grin—is developed into a laugh, a bigger laugh by effective business, and then into a roar.
Point after point follows—each point topping the preceding point—until the end of the two-act is reached in the biggest laugh of all.