Killer Instinct's update yesterday added the new Shadows Mode that creates an AI fighting style from your own strengths, weaknesses and tendencies. That includes teabagging, as this video above shows.
That's right, that's a player (TGF1Gaming of YouTube) getting teabagged by his own shadow. If you've done that to downed opponents in your fights, the Shadow knows! And it will use it on you the same way it uses the combos and defenses you favor. Developer Iron Galaxy referred to this — specifically teabagging — at a panel at PAX East, and here you can see they've delivered.
Shadows Mode offers the ability to spar against yourself or shadows created by friends and others in the Killer Instinct community. Like the Drivatars in Forza, they're an always-available roster of opponents. You can learn more about the update (which includes new fighter Aria) it in yesterday's Xbox Wire update, or through the video below.