Down by the gumline beside the tongue but with a sweeping view into the distance, where the front teeth are partially opened, allowing outside light in. The teeth are quite dirty, having just eaten, and saliva pools are visible. Twilight Sparkle is in the foreground, talking with some microponies who are scraping plaque off a giant molar nearby.
Meanwhile, outside in the macro world, Pinkie Pie and Rainbow Dash sitting at home watching TV. Pinkie is angrily saying to Rainbow "Hey! That was MINE!!" , as, among other junk food, an emptied packet of sweets lies on the floor, surrounded by crumpled wrappers.
A commission for Electric Blue.