 My first bio horde won't forget it because the hair was attached to the mattress. I eagerly volunteered to be the one to remove the hair from the mattress, realizing just how crunchy it was. I will never forget the sound off that crunch. It was also one of the most organized hordes that I've cleaned as well and one of the worst bathrooms that I have seen in real life. But just the sound off the crunchiness of that hair, I don't think that sound will ever leave me at all.