Related:

• You obviously mistook me for someone who knows.
• Of, excuse me, I though I was someone else for a moment.
• In the Roadrunner cartoon, the coyote has been chasing him for 25 years.
  I'd like to see him finally get right up to him and go "Sorry, I thought you were someone else....
• I'm sorry, you seem to have mistaken me for someone who cares.
• I stole this tagline from someone else!
• I was arrested for walking in someone else's sleep.
• I was walking in someone else's sleep last night.
• Monica: Okay. It's-it's about Alan. There's something that you should know.
  I mean, there's really no easy way to say this.. uh....
• My one regret in life is that I am not someone else. -- Woody Alle