There's a pitch dummy model that has 1 animation for each angle (90 degrees up and 90 degrees down) and you add an attachment to it. They might use it in their system. If that's not it, why don't you check out those systems on what did causes the pitching?
But if they do use that pitch dummy, know that the attachment doesn't play animations on command and will only play the Stand animation, I think. Or no animation at all.