The act of hurting oneself while performing a stunt on a late night show. Comes from the october, 2009 incident where Conan O'brien fell hitting the back of his head as he was performing a skit with guest Terri Hatcher. A few days later, Jay Leno Pulled a Conan by banging his head during the taping of a show. He did say, however, that he would've rather Pulled a Letterman.