Correct mounting boss heads or heads that have dialogue will cause the heads to talk/cry. Its super awkward and me and buddy spent hours looking for the ♥♥♥♥ till we finally realized it was the deer boss skull hung above my sisters bed in her great hall style house XD which was mounted way up high out of the way.
my sissy got a great laugh out of it when we finally asked her if she knew anything about it and she said yeah! that's why she hung it up.
it looks great and it adds a bit of dialogue to a pretty dialogue barren game =)