There used to be this thing going around on pre-smartphone phones (via Bluetooth, I assume) that showed a pocket watch closing and when it was fully closed, the phone shut down. We all thought it was hilarious to send it to as many people as possible and watch them panic. I don't even know what format it was to look like a normal gif or video and do that. I certainly didn't even care back then.

[–] NoisyFlake@lemm.ee 1 points 1 year ago

My guess is it was an actual gif that exploited some flaw in how the OS handled gifs and thus was able to execute code.