You do believe me, don't you, Dad?

Mr. Buxton:

[after Pee-wee and Francis wrestle in the bathtub and Pee-wee is trying to open a window]
Pee-wee, Pee-wee! What is going on here? Pee-wee Herman:
He's a thief! He stole my bike! Francis:
You liar! I swear I didn't do it, Dad! Mr. Buxton:
Pee-wee, this is a serious accusation. Do you have any proof? Pee-wee Herman:
Well, not exactly. Mr. Buxton:
Pee-wee, the Buxtons are not thieves. Just look at him. [Francis gives a sad puppy face] Mr. Buxton:
He couldn't have stolen your bike. He hasn't left this house since yesterday. We've been setting up Francis' birthday plans all day. Pee-wee Herman:
Gee, I guess I was wrong. We don't have to involve the authorities in this matter, do we, Mr. Buxton? It was an honest mistake, and I'm very sorry. Mr. Buxton:
Well... I still think you should apologise to Francis, and then I want to see the two of you shake hands. Pee-wee Herman:
I'm sorry, Francis. [Shakes his hand, and reaches for his trick gum] Pee-wee Herman:
Here, would you care for some gum? [Francis takes a piece of trick gum] Pee-wee Herman:
Would you like some, Mr. Buxton? Mr. Buxton:
Oh, thank you. Pee-wee Herman:
Spearmint or fruit? Mr. Buxton:
Uh, fruit please. [Takes a piece of trick gum] Pee-wee Herman:
[leaving]
Well... goodbye! Mr. Buxton:
Goodbye. Francis:
You do believe me, don't you, Dad? [as Francis chews the Spearmint trick gum, the saliva in his mouth turns black. Mr Buxton screams as he realizes his own fruit trick gum is spicy]