Lots of actors talk about how scary it is to host SNL. What if you flub the punchline? What if you break during the broadcast? What if your monologue falls flat? But there's a flip side. Have you ever considered what might happen if your SNL stint was too good? Oscar, BAFTA, and Screen Actor's Guild award-winning actor and cultural treasure Christopher Walken appeared in one of the all-time great, most iconic SNL sketches in the show's storied history when he hosted an episode of the 25th season in April 2000. "More cowbell!" I've …