"I've always looked upon cartooning as comedy's last frontier. I have done stand-up, sketches, movies, monologues, awards show introductions, sound bites, blurbs, talk show appearances, and tweets, but the idea of a one-panel image with or without a caption mystified me. I felt like, yeah, sometimes I'm funny, but there are these other weird freaks who are actually funny. You can understand that I was deeply suspicious of these people who are actually...