"Pshaw, I ain't goin' to hurt you.

Come on." Sam, maintaining his position near the other door, Penrod went to him and caught him round the neck.
"Watch me, Rupie!" Penrod called, and performed upon Sam the knuckle operation which he had himself just undergone, Sam submitting mechanically, his eyes fixed with increasing uneasiness upon Rupe Collins.

Sam had a premonition that something even more painful than Penrod's knuckle was going to be inflicted upon him.
"THAT don' hurt," said Penrod, pushing him away.
"Yes, it does, too!" Sam rubbed his temple.
"Puh! It didn't hurt me, did it, Rupie?
Come on in, Rupe: show this baby where he's got a wart on his finger." "You showed me that trick," Sam objected.

"You already did that to me.

You tried it twice this afternoon and I don't know how many times before, only you weren't strong enough after the first time.