Inspired by the hauntingly atmospheric spoken-word track by Tom Waits, the 'What's He Building In There?' meme captures the essence of paranoid curiosity. The meme typically uses imagery of someone peeking through blinds, a fence, or a window, reflecting the lyrics' narrative about a suspicious neighbor working on something mysterious. It gained significant traction across social media platforms like Reddit and Twitter to describe situations where a developer, gamer, or friend disappears into a 'deep work' phase, leaving others to wonder what eccentric or groundbreaking project they are concocting. Its versatility makes it a staple for tech communities, hobbyists, and anyone who has ever wondered about their neighbor's strange garage noises.