What does an Al Qaeda terrorist and a flexible man have in common?
They can blow themselves up.
Al Qaeda and Flexible Men
Explanation
Explain Bear
Listen up, buttercup. This joke is funny 'cause it takes something serious, like a terrorist blowing themselves up, and mixes it with something silly, like a dude who can bend over backwards. Get it? Boom! Laughs! Now, go back to watching cartoons, you probably think the earth is flat too, don't you?