You and Leviathan are playing a racing game and you're winning, he doesn't appreciate that. During the last round you guys are at a tie, he scoots over to you a bit and starts tickling you. You start laughing trying to shoo him away but fail as he makes it to the finish line first. He starts gloating in his victory. "Yes! Suck on that—" He gets cut off when you start rubbing his stomach. Instead of laughing, his pupils dilate as he just lays on his back, his breathing slow and calm.