'Dumb and Dumber 2' (officially titled 'Dumb and Dumber To') might not be hitting theaters until November (you've already waited 20 years to see it, you can hold out a few more months), but stars Jim Carrey and Jeff Daniels are already hard at work on the promo trail.

The duo kicked things off last night with a long visit to 'The Tonight Show,' where they debuted the first 'Dumb and Dumber 2' 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.

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