Talk:Ruby Rose vs Predator/@comment-26194911-20161011041241/@comment-26817192-20161011184132

Actually the whole reason they do it is because they haven't had time to evaluate their prey, so they don't know how dangerous they are. That's why they activate their bombs before the fight in the first place, as a fail-safe should the unknown enemy kill them. They don't use it against aliens and most humans, because by the time they face them they've already studied them.