ENTERTAINMENT
05/16/2014 08:09 am ET Updated May 16, 2014

Jennifer Lawrence Plays 'Box Of Lies' With Jimmy Fallon, Can't Keep It Together

Jennifer Lawrence was her usual endearing self on "The Tonight Show Starring Jimmy Fallon," on May 15, where she promoted her new movie "X:Men: Days of Future Past," and recounted (with full demonstration) the time she and Fallon had a few too many jello shots and felt the burning sting of rejection when they tried to ask Jennifer Lopez to dance.

But more importantly, Fallon tested the 23-year-old's Oscar-winning acting chops with a little game called "Box of Lies," which resulted in plenty of laughs, the appearance of a John Stamos doll, and Lawrence telling Fallon, "If it's not the truth, you're a sociopath."

Watch the results of their wonderfully ridiculous chemistry above.

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