My pastel has woken me up 3 different nights doing this. Its a horrible sound ( fortunately no smell so far). The first time she did it, I was having to keep my bumblebee in the cage with her until I got my rack in. I was dead asleep when she let it rip. It literally sounded like she was killing my bumblebee and the bee was making some horrible death gurgle / scream for help. I jumped up and still half asleep started yelling at the cage to get her to stop... When I got over there and figured out what was going on, felt a little foolish for actually yelling "stop it" to a bp.... It didnt help that both of them were just laying there out of the hide trying to figure out wtf I was doing.