The iceberg was a terrible comedian

This joke sails into the realm of wordplay, specifically a delightful pun. The setup introduces us to an unlikely performer – an iceberg trying its hand at stand-up. The punchline, "His jokes were just the tip of the problem," cleverly twists a well-known idiom. We expect "tip of the iceberg" to refer to the visible part of the ice, but here it's applied to the *quality* of the jokes, implying that the *real* issues with the iceberg's comedy act (or perhaps its very existence as a comedian) were much larger and hidden beneath the surface, just like its massive submerged body. It's the unexpected double meaning that makes us chuckle.

Speaking of hidden depths, the real-world context of icebergs is what makes this pun so effective. These majestic chunks of frozen (Review) water are famous for showing only a fraction of their true size above the ocean's surface. A whopping 90% of an iceberg lurks unseen below the waterline, making the phrase "tip of the iceberg" a perfect metaphor for any situation where only a small part of a larger issue is apparent. So, when our icy comedian's "jokes" are just the tip, we instantly understand that his entire act, and maybe even his decision to pursue comedy, was a colossal, submerged disaster. It’s a cool blend of natural science and linguistic wit!