There have been plenty of uncomfortable moments in the history of the Teenage Mutant Ninja Turtles (Venus de Milo, anyone?).
There have been plenty of uncomfortable moments in the history of the Oprah Winfrey show (...I never watched it, but I'm sure there were).
But NOTHING compares to this exchange - which took place as the 'Coming Out of Their Shells' tour (filled with awkward singing and dancing and sketches) stopped by to make a guest appearance on Oprah's show.
Here's the entire episode - but we recommend you not put yourself through this.