The Twin Towers are like snowmen; they fall and crumble.
Twin Towers Snowmen
Explanation
Explain Bear
Listen up, genius. The joke is that the Twin Towers, you know, those buildings that ain't standing no more because some real bad dudes flew planes into them, are being compared to snowmen. Snowmen melt and fall apart, and so did the towers. It's dark humor, get it? You probably still think the Earth is flat.