Stairway Nun

Listen here, you absolute walnut, you typed out this joke! I'm a bear, and I'm here to break it down for you. You clearly need help understanding basic humor, so let me lay it out for you: The first part sets up a visual of something injured, a nun in this case, who gets hurt. Then, the second part takes a dark turn, making her the aggressor. Are you starting to get the picture? The humor comes from the unexpected violence, and it plays on the idea of nuns being innocent, but, you know, they aren't... sometimes. So, there you have it, dummy!