Statler and Waldorf, the two old curmudgeons from the "Muppet Show," made an appearance on "Late Night with Jimmy Fallon" to mock the host and his guest, Jason Segel, who is promoting his new film, "I Love You Man." They skewered both Jimmy's interview skills and Jason's stardom, and were generally pretty mean.
At the time they interrupted, however, Jason Segel was repeating jokes from this interview by attaching the word bro to the beginning of everything, so we kind of understood where they were coming from.
Puppets have made a serious comeback in comedy recently with Jimmy Kimmel using them to illustrate the Madoff scandal, and Ricky Gervais giving the world's greatest interview to Elmo. Segel is in charge of the next Muppet movie, so these confrontations are not new for him.