Size of this preview: 613 × 479 pixels. Other resolutions: 307 × 240 pixels | 614 × 480 pixels | 767 × 600 pixels | 982 × 768 pixels. Full resolution (download) (1,151 × 900 pixels, file size: 504 KB, MIME type: image/png) About File History There is no description yet. Add a description. Appears on these pages of List of chalkboard gags The following is a list of chalkboard gags seen on The Simpsons. Stark Raving Dad/Gags I am not a dentist. File history Click on a date/time to view the file as it appeared at that time. Date/TimeThumbnailDimensionsUserComment current01:37, December 3, 20111,151 × 900 (504 KB)Jhonevans (wall | contribs) Read more List of Lisa's sax solos List of couch gags/Seasons 6-10 Sometimes characters on the Simpsons break the fourth wall. In "Treehouse of Horror XVIII... Breaking The Fourth Wall Retrieved from "http://simpsons.wikia.com/wiki/File:3CE1.png?oldid=233684"