When your OTP hasn't seen each other in months (if you want to get angsty years). When finally the moment comes and they see each other, Lock eyes, and start running. Person 1- The one who jumps into the others out stretched arms. And Person 2- The one who stops right before they smash into each other, opening their arms like a catcher's mitt and falls back a little as Person 1 launches themself like a rocket. Because by this point in their relationship, it's always the same one who falls harder and harder, while the other is there to catch them.