ian.

A grin pulls at his lips.  He’s sure Blaine could just join in and take a swing himself – or a slap even if he feels like going easy – but that was against his character, wasn’t it?  This was just ridiculous all around.
He pats Blaine’s shoulder before moving away to start sorting through the dusty junk that was stored down here.  “Simple enough.  At least we’re not breaking any laws here. Unless we’re trespassing, but I doubt there’s security checking.”  He says jokingly, opting to shake off the atmosphere of the basement as much as possible with some humor.

Him?  Join in and take a swing himself?  Not unless they were doing it in a totally different situation.  Where anyone could take a swing and no one would say a word.  In fact, they enjoyed it.  Which he didn’t know Ian enough to talk about yet.  Picking at the cuff of his right sleeve with his left hand–Blaine watched as Ian parted from them and went to rummaging through the dozens of dusty boxes, broken furniture and otherwise creepy stashed piles of whatever covered in dust and cobwebs.
Not wanting him to feel like he was the solo participant in this–he crept over to a stack of boxes (subconsciously keeping close to Ian as he did so) and started through them.  Carefully.  “You don’t think anyone would notice if we were down here do you?  I mean–technically–it could be trespassing but..  I really don’t want to get in trouble for a stupid DARE.”  And the box slammed shut.  Hard.  Nope!  Nothing in there!  Definitely not a mass of cobwebs he was NOT going to stick his hand in.  No way!