Josh Horowitz mistakenly asked Keanu Reeves if the voice of Bill would come back naturally...

Keanu Reeves simply replied: “I played Ted.”

Horowitz responded, “Oh my God” and got up and walked away due to the sheer embarrassment of the situation.

Longer interview and source for this clip: https://www.youtube.com/watch?v=t1pQ5hS-TfI