Big-ass forehead. Squinty eyes all squished together. Mouth gaping like a shark’s, with nearly as many teeth. Caricature is funny because our brains do it already: to recognize thousands of people whose facial features differ only by millimeters, we exaggerate the two or three things that set them apart. Caricaturists like Tom Richmond, Mad magazine illustrator and winner of this year’s Reuben Award for Outstanding Cartoonist of the Year, just exaggerates a little more. Richmond gives caricature lessons and speaks about his new instructional book on Saturday, Aug. 4, at the Schulz Museum. 2301 Hardies Lane, Santa Rosa. Class, $35—$40, 10am. Book signing, free, 2pm. 707.579.4452.