They talked with fearful rapidity; their wit and repartee seemed inexhaustible.
"As I was going down the street yesterday--" "Ah! as YOU were going down the street--all right." "I saw a girl at a window----" "YOU saw a girl at a window." "And this girl she was a corker----" "Ah! as YOU were going down the street yesterday YOU saw a girl at a window, and this girl she was a corker.

All right, go on." The other comedian went on.

The joke was suddenly evolved.

A certain phrase led to a song, which was sung with lightning rapidity, each performer making precisely the same gestures at precisely the same instant.

They were irresistible.