The phrase is widely recognized through the time-card style used in SpongeBob SquarePants, where a narrator announces a humorous jump in time. Online, "12 seconds later" became a handy micro-transition for memes, short videos and reaction edits because it exaggerates even the smallest delay. It stays popular because the joke is universal: something changes almost immediately, yet the clip treats it like a major passage of time. Creators often pair it with bruh-style reaction humor for extra payoff.