When one partner is crouched atop another during sexual intercourse, a third party enters the room in an erect state and quickly enters and exits the anus of the person on top. Before the blitzkrieged person can turn around, the third party has disapeared from view. The partner on top is left in a confused state wondering what hit her/him, very similar to the powers of Poland, Holland, Belgium, France and Russia at the outset of the Second World War.
Jess was riding Dave when suddenly she felt a violent and intense splitting of her butt cheeks as if a division of Panzers charged through. She paused for a moment, noticed her and Dave were alone in the room, and continued sex without bringing it up. Jake walked away after the most successful blitzkrieg yet.