Placing a bag of microwave popcorn into the microwave oven and pressing the start button initiates the sequence. The door seals shut, the light turns on inside, and the turntable begins to rotate slowly.
In the opening minutes, the appliance produces a steady hum while the timer counts down. The bag travels steadily on the turntable, warming to the touch if checked, but it remains flat and compact. No popping noises interrupt the quiet, and the bag's exterior displays no alteration in form or size.
Seconds turn into two or three full minutes, with the process continuing uneventfully. The bag shows no signs of internal activity, maintaining its original appearance amid the rotation and hum.
At that point, a single pop emerges, soon joined by a rapid series of bursts. The bag starts to expand noticeably, filling out as the kernels transform. The change becomes plainly visible and audible.
This progression reveals latency effects in microwave popcorn, where the action of starting the heating precedes the observable popping by a distinct interval of time.