[They don't slam at all, no. Hiccup is a very good flier for that to happen, and Jack is really taking advantage of the situation to press himself against his friend as close as possible. Going through the H is like being showered with light, the sensation warm and a bit funny but not bad. The room they end up in is... well, empty, only brick walls and floor surround them... and colors. See, there's this neat trick going on, where the light that enters through the Hogwarts crest absorbs the glass color and fills the room with sparkles of all kinds. Blue, green, red, yellow, black, you name it. It's quite beautiful when you stop and watch.

Jack isn't exactly doing that at the moment, though. Maybe because he's been here before... or more probably, because he's a little too busy laughing and celebrating their smooth entrance. He even lets go of Hiccup to throw his arms in the air like he wanted.]

Fuck yeah, we did it! ...well, you did it. But you get my point. [After the way they stood on the broom during their little trip, Jack isn't afraid of touching Hiccup anymore, so soon his grabbing his friend again. An arm goes around his chest, bringing him closer, his own chest against Hiccup's back, and his free hand goes to ruffle all that brown hair.] You're so fucking cool! Have I told you lately? Best flier in the school right here! And he's my friend.