- Heh, heh, heh. . .

- What did you do now?

- What do you mean "What did you do now"?

- You were laughing.

- So?

- That's your mischievous laugh.

- No. That's my evil laugh.

- Evil laughs go "Bwa-ha-ha-ha-ha!"

- Ah. . . BWA-HA-HA-HA-HA!!!

- Well?

- Well what?

- What did you do?

- Practice.

- Practice what?

- My laugh, of course.

- Heh.