PBS mainstay 'Mr. Wizard' was so crotchety back in the day that comedy writers Mike Schuster and Diane Bullock had to make two videos just to contain all of his hilarious put-downs and snide remarks directed towards his young sidekicks. (You can watch the first Mr. Wizard supercut here.).

If perhaps you don't remember his show, this should give you a fairly good idea of what it was -- an old man who liked to teach kids about science by picking on them and ruining their clothes.