You're trying to read a contract when your colleague starts bouncing his leg like he's auditioning for a drum solo. You don't say anything—you're a professional. By hour two, you've memorized the exact rhythm: *thump-thump-thump-pause-THUMP*. You realize you could file a noise complaint with HR, but instead you just start bouncing your own leg in a different tempo, creating an unintentional techno track that makes him stop in confusion and horror.