Back in 2009, when Paul Rudd and Jason Segel were promoting "I Love You Man," they gave a highlariously random interview to Rotten Tomatoes. Over the seven-minute interview, which is really more of an improv routine, Segel invents an imaginary friend named Gideon who "rides a unicorn" and "visits you in your dreams."
At one point Segel also falls over laughing, complaining, "I'm hungry."
The video was posted back in 2010, but has just started making the rounds again. It's an all-around good time.