And now my head has started to itch. I think I have a rash or something.

4 seconds sound clip from the It's an Adventure, Charlie Brown movie soundboard.

You can hear this line at 00:02:18.767 in the Blu-ray version of the movie.

Quote context

[...]

- And on top of it all, I feel terribly alone.

- OK, now tell me more about this huge baseball.

- There's a full moon tonight, big brother. You should go out and look at it.

- Maybe I will. Thank you.

- How about an ice-cream cone, big brother?

- Maybe I will. Thank you.

- One ice cream cone coming up.

- Everything I see looks like a baseball to me.

- And now my head has started to itch. I think I have a rash or something.

- Turn around. Let me look.

- I think you'd better see your pediatrician, Charlie Brown.

- Yes, ma'am, I have an appointment to see the doctor.

- Well, it all started one night when I couldn't sleep. And I saw the sun come up. Only it wasn't the sun. It was a baseball.

[...]