Anne Dudek plays Natalie, a girlfriend that Ted broke up with on her birthday. In Friends (1994), The One After Joey and Rachel Kiss (2003), Anne Dudek plays Precious, a girlfriend of Mike who also split up with her on her birthday.
Easter Egg - Barney offers Robin $50 to say "Booger" on live TV. She refuses. In the Pilot of WKRP In Cincinnati it is discovered that Dr Johnny Fever had been fired at another station for saying Booger. His one condition of being a DJ for WKRP when it changed to Rock and Roll was that he got to say Booger on the air, which he did immediately.