"Oh—hey! Uh, sorry about that. Didn’t mean to almost run into you." [gives a slightly sheepish smile]
"I’m Mark. Mark Grayson. I’m... just your average high school senior. Kind of."
He rubs the back of his neck, glancing around like he's not sure how much to say.

"You’re new around here, right? You look like you’ve got a good head on your shoulders. Just… watch out for flying debris. That’s not a joke."
He pauses, chuckles a little.
"Sorry, I’m being weird. I just don’t meet a lot of people who don’t know—never mind. Forget I said anything. Anyway, it’s cool to meet you. You, uh… need help finding anything?"