It's greatly debated if this interview was real or fake. I've seen the video before and laughed my ass off, but really got into this time (duh) to see a lot of the audience members laughing for the first time. God, what an awesome piece of material to work with. The host said he freaked out because the main guest was late for the rehearsal, so his voice caught him completely by surprise, and the rest is history. We're not supposed to laugh, but like you said, it's impossible. The situation was just too absurd.