I would tap him on the shoulder and say hi to him, and start a conversation like, Oh, are tu Shawn Frost from Alpine who helped Raimon take on Alius academy and win the F.F.I? At the end i would just say sorry I've got to go...but! i would leave something of mine behind purposely so he would have to bump into me again, and when we do I'll start being más friendly to him until are friendship becomes something special! <3