[spoiler]He can't see you specifically but since you're invisible he can see your footprints through your feet. That's why he stomped on your foot first. Since he doesn't actually turn invisible, you're going to have to come up with a different way to see him.[/spoiler] *You hear a muffled giggle come from somewhere behind you.* [spoiler]That's if he didn't find surprising people funny.[/spoiler]