Just the biggest power supply explosion on its own.

You can now buy me cake and things to take apart at:- https://www.patreon.com/bigclive
To make the power supply blow up in such a dramatic manner I only needed to put three 4700 ohm quarter watt carbon film resistors in parallel across the mains pins. It was a genuine electrical explosion at 240V that took out a 13A fuse.

I used three resistors for more effect and smoke. I left the lid unscrewed so it would fly off when it went bang.