A rare situation that may occur where a couple involving a sexual intercourse using either the missionary posture or the woman-on-
top posture.
When using an excessive force, shaking the bed and banging the walls, an artifacts placed on the
wall (such as a picture) or otherwise on furniture, may fall on one of the
sex participants.
A situation where the couple proceeds with the intercourse regardless of the hit, is called 'headframe'.
The name origins is in a
real-life case where a male, while on
top of the woman (missionary posture), was hit with a wall-picture. The picture itself smashed, but the frame retained on the male partner's
neck till the end of the intercourse.