Jay Leno Jay Leno

Whether you're a fan or not, there's no denying Jay Leno is a comedy legend. On Thursday's Last Comic Standingcontestants are surprised with a trip to Vegas to pick Leno's brain for tips and tricks to make it in stand-up.

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When asked how he knows when a joke is played out, the former Tonight Show host explained, "Well, when it doesn't get a laugh anymore," before going into the differences between being on the road and performing his nightly monologues.

Watch the exclusive sneak peek below to see Leno's other tips. Plus: He reveals his worst gig and more.

Last Comic Standing airs at 10/9c on NBC.

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