Yes, or she might answer you with an umbrella.
This is a flash-back. But, the comedian gets a bigger laugh on the next line—worked up by a gesture:
COMEDIAN Over the head.
Or take this form of the flash-back, which may seem an even clearer example:
COMEDIAN
Oh, I know how to be disagreeable to a lady. You ought to hear me talk to my wife.
STRAIGHT
To your wife? Any man can be disagreeable to his wife. But think—,
and so on into the introduction to the next point. It is always a safe rule to follow that whenever you give the straight-man a flash-back, top it with a bigger laugh for the comedian. How many flash-backs you may permit in your two-act, depends upon the character of the material, and also varies according to the bigness of the roars that the business adds to the comedian's laughs. No stated rule can be given you. In this, as in everything else, you must carve your own way to win your own business.