A frog, a scorpion, and a spider walk into a bar. The bartender looks at them and says, "What is this, some kind of meta-joke?"
The frog replies, "No, it's a paradoxical situation."
The scorpion raises its pincers and says, "Or is it a dangerous encounter?"
The spider, covered in eyes, just stares at them and says, "A joke is not funny when it's explained."
The bartender chuckles, "Well, this joke just went hard."