'Dumb and Dumber To' is not hitting theaters until November, and stars Jim Carrey and Jeff Daniels are already hard at work on the promo trail.

The duo kicked things off Tuesday night with a long visit to "The Tonight Show," where they debuted the first "Dumb and Dumber To" trailer and covered a bevy of topics, like what the first day back on set together was like, the Canadian soap opera in which they starred with host Jimmy Fallon, fake arms, naps -- and, yes, you read all that correctly.

Minced into an interesting interview about the production of the pair's next opus, Fallon and the guys also reminisced about their fake-armed Canadian career, Carrey's need for a nap, and we think something about lettuce. This one has it all.