"Breaking Bad" star Lavell Crawford knows funny ... even when funny can kick the living crap out you -- 'cause he thinks Quentin "Rampage" Jackson is the most hilarious fighter in the world.
Crawford was at Gracie Barra Ju-Jitsu in Los Angeles -- on his way to a workout -- when we asked the veteran stand up comedian which MMA fighters make him laugh ... intentionally or not.
We'll let Lavell explain his choice, but please, please, please -- watch this video to see LC get his grapple on with an instructor. We promise ... the aftermath is worth the wait.
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