As title, though only under specific conditions of switching from none standing animation to standing animation. (IE: Sitting on a furniture and standing up, finishing sex lab animation and standing up.)
At which point their feet would start to jiggle out of control, making sounds like it is constantly colliding on/in the floor and get launched into the air, disappearing into the skybox outdoors and squishing into the ceiling in doors until the collision break enough they phase through it,