Discover the Hilarious Moment Penny Realizes Zack's Intelligence - The Ultimate Scene from The Big Bang Theory 🤣💡In an uproariously comedic plot twist, Penny's former flame Zack reveals his true intellectual colors during a scientific experiment with the gang. Witness the baffling interaction that leaves everyone questioning Zack's grasp on reality as he fears the moon might just blow up from their laser experiment. Let's watch the video and relish the unforgettable moments from this iconic scene.