AM Disc Jockeys do it with Modulated Amplitude. Accountants do it for profit. Accountants are good with figures. Actors do it in the limelight. Actors do it on camera.
Actors do it on cue.
Acupuncturists do it with a small prick. Alexander Portnoy does it alone. Algebraists do it in groups. Algebraists do it with homomorphisms. Algol programmers block it out.