Uh, you're a mutant.
4 seconds sound clip from the Planet of the Apes (1968) movie soundboard.
You can hear this line at 01:18:48 in the Blu-ray version of the movie.
Quote context
[...]
- A fort!
- Unconsciously, you chose a name that was belligerent.
- Then you don't believe that prosecutor's charge that I'm a monster created by Dr. Zira?
- That's what Zira and Cornelius claim.
- You're talking heresy, Doctor.
- Well, suppose I am a mutant? How can the appearance of one mutant send you into a panic?
[...]