"...so if I told you there was a pink elephant walking across the grass behind you, would you believe me?"
He laughed, "No way!"
"Okay, so if I said you were the most stupidest kid I'd ever talked to, would you believe that?"
His face fell a bit, and he looked doubtful about saying 'no'.
"You see, it's really hard isn't it?"
"Yeah."
"So I'm going to say some stuff now and I want you to 'pink elephant' everything I say to you now, okay?"
"OK."
"Right, so.. you're the most stupid person I ever spoke to..." He faltered a bit so I nudged him with a whispered 'pink elephant'.
"Good. And none of your friends really like you."
A muttered pink elephant came back.
"And you're never gonna have any friends."
"Pink elephant." Slight smile.
"And you're not ever going to have a friends at secondary school."
"Pink elephant."
"And eventually you're gonna end up a lonely old git in a council flat surrounded by empty beer cans."
He laughed. "Pink elephant!" he said loudly.
I laughed too. "Very cool," I said, and held out my fist for him to pop with his.
He did and grinned.