You'd think that portraying an advertising executive working in an office wouldn't be that dangerous or physically demanding, but last night on Conan, Jon Hamm recounted the times that he's been seriously injured while portraying Don Draper.

The best part is that Elizabeth Moss aggravated his broken hand—received in an explosion during a flashback war scene during the second season—when she firmly shook Hamm's hand after Peggy Olson was promoted to copywriter.