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02/15/2013 03:38 pm ET

Molly Shannon Cracks Up Jimmy Fallon On 'Late Night' As They Reminisce About 'SNL' (VIDEO)

When former "Saturday Night Live" cast members get together, as they often do on "Late Night With Jimmy Fallon," we always know we're in for a great conversation -- and bonus points if they share inside jokes from the writers' room.

That's exactly what we got when Molly Shannon visited "Late Night" on Thursday to plug her new children's book (hear about that in the video below) but first she and Fallon reminisced about the games they used to play when staying up late at 30 Rock to write sketches. Ironically, part of the game involved not cracking up, which is something that Fallon admits he has always had a problem with ("I used to ruin every bit," he jokes).

Watch part one of the interview above and see part two below to hear about Shannon's post-"Superstar" dilemma: random strangers coming up to her in public while smelling their armpit-fingers. Gross.

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