Transcript:
Kate: Oh. I get it. You're afraid!
Phil: What?
Kate: You, Mr. Invincible, are scared of roller coasters!
Phil: I'm not "scared" of them! I just– don't like them!
Kate: OK, then, let's go for a ride then! I want to ride it, but don't want to do it alone. So, you'll go with me, right?
Phil: Would you believe me if I said I got motion sick?
Kate: Do you?
Phil: . . . No.

Yeah, i wouldn’t believe that either, since I’ve seen him used as a projectile weapon before.