“Hey! You remember a chain called Plucky Pennywhistle’s?”
“Really? I could’ve sworn you loved those places.”
“No dude, I hated them. You would dump me and go trolling for chicks.”
“It’s not like I left you in jail. I mean, those places are suppose to be fun.”
“Fun? Uh, they’re lame, and they smell like puke, and the ice cream is all grainy.”
“Alright, don’t have one of your episodes okay? I’m just saying, I hit a dead end with this whole wishes-gone-wild thing, but both kids were at Plucky’s day of. Look, why don’t you go check out the local Plucky’s and ask about this Billy kid–”
“Look man, w-why don’t I just uh…why don’t I just wait for you to get back?”
“No can do Hermano, I’m on my way to talk to little Billy.”
“Why–why–why don’t I talk to little Billy…right now.”
“…[laughs] Wait, wait, wait this isn’t about your uh, clown thing is it?”
“What in the world did they do to you? Alright you know what, never mind. Just know that 99.99% of all clowns, can’t hurt you. Okay? And if it bleeds, you can kill it.”
*Sam hangs up the phone*
“If it bleeds you can kill it…if it bleeds you can kill it.”

Season 7 Episode 14: Plucky Pennywhistle’s Magic Menangerie

I love these two…because first they go from acting like an old married couple; with Dean telling Sam to calm down and not have one of his freakin episodes, to an older brother trying to explain to the younger brother why the big bad clown can’t hurt him. 
Anyone who says Dean Winchester is not an awesome big brother needs to re-take a look at this man. Because when he says “Sammy” he’s (yes) saying to joke with his brother, but he’s also saying it because he’s picturing Sam on the other end of the phone with his scared little expression that he use to get when he was younger. So naturally, he reverts back to being the protective older brother that tells him nothing can hurt him.