He wasn't doing anything out of the ordinary, just looking down from his perch on the mantel as usual, when suddenly the "Waterfire Providence" poster shoved him off!
Just like that.
He bounced onto the stone hearth and landed on the tile floor. Ouch.
Miraculously, the other two mannequins on the mantel escaped injury. In fact, they displayed no interest at all in this event. Cold.
(Full Disclosure: I confess that I may have accidentally bumped the poster when I was putting a wig on the unconcerned mannequin on the left. Obviously, I should have taken it down first.)