It's the approach. Instead of a super-controlled fearful approach to Drawing, a Professional CARICATURIST has to keep that marker Moving. Calmly ~ like a Professional Driver. A Professional Artist knows how to do her job. She has Confidence.
Here is a picture that I just made up before the first Guest arrived at a recent event. Usually more geometric, but even my Warm-Ups are interesting.
You can click on some pictures in this blog to see them larger.
To Hire Caricature Artist Alison Gelbman: