Unstable pressure plate trap

This build is a cathedral with two pressure plates in the middle. stand on one and get off nothing happens stand on both the system is primed.

once this happens Releasing off either plate will cause the whole floor to blow up. I've rigged it to drop what survives in the void but if your trying to recreate the unstable scene the tnt will eliminate any itemless player.

The system is one time use if you use it with tnt off and you need to prime it add tnt to the bottom if needed and the white wool might need to be moved in some parts. in last image is the wool move it back to the non sticky piston and the tnt on the floor next to the white wool might be missing after a false activation.

This redstone build measures 63 × 117 × 117 and uses 165,138 blocks across 17 different block types, mostly tnt, polished andesite, obsidian.

It is made for Minecraft Java Edition 26.1.2. You'll need Vanilla (No Mods) to build it as intended.