"Self-Destruct" Countdown

Bobert initiates a ten-second countdown after being pinned under the library shelf (which takes 3 to 10 seconds for each "second") and Gumball and Darwin immediately assume that Bobert is about to self-destruct to take them down with him. However, it's actually the countdown for how much time is left on the bet the placed on him earlier.

Example of:
Bait-and-Switch