Watch 'True Detective' Stars Join Fallon For Tense 'True Confessions'

Was Colin Farrell really questioned as a suspect in an attempted murder? Did Jimmy Fallon once get his head stuck in a fence?

Channeling the tense atmosphere of their HBO series, True Detective, Colin Farrell and Vince Vaughn joined Jimmy Fallon for a game of deception, "True Confessions," on Thursday's Tonight Show. Seated around a table filled with lit cigarettes, cups of coffee and mysterious envelopes, the trio took turns confessing long-buried secrets – as the other two fired off "good cop/bad cop" questions to sort out truth from fiction.

Farrell begins his turn with heavy twitching and blinking, as he impersonates Robert Durst from The Jinx. "When I was a late teen, I got brought in for questioning as a suspect in an attempted murder," he confesses, but Vaughn and Fallon don't buy it, grilling the actor with a round of detail-specific questions. Vaughn is swayed and guesses Farrell is telling the truth – which he is. 

Fallon's confession is more trivial: "I got my head stuck in a fence, and my grandma used mayonnaise to squeeze me out." But when Farrell asks about the brand of mayo in question, the host gets giggly and nervous. The actors decide he's lying, but it turns out Fallon really did get stuck in a fence for around an hour around age 10 while playing a childhood game. 

Vaughn boasts that he "once defiantly commanded the stage in the title role of Oscar Hammerstein's The King And I." Farrell asks what Rotten Tomatoes score his performance received, while Fallon persuades the actor to sing a snippet of "Getting to Know You." They decide he's telling the truth – the correct choice. 

Season Two of True Detective premieres Sunday, June 21st on HBO. Anticipation is high following the acclaimed first season, which starred Matthew McConaughey and Woody Harrelson in career-defining roles. But reviews for the second installment have been mixed. Rolling Stone's Rob Sheffield wrote that the first three episodes lack the first season's acting chemistry and surprise factor, though he praised Rachel McAdams for her magnetic performance. "Her transition from mean girl to bad cop is amazing," Sheffield said in his review. "She's a tightly wound, sarcastic loner with a thing for knives and no particular desire to hide her rage."