So I was reading some books with implosion grenades in them, and was wondering if they were theoretically possible. Here are a few things I came up with from research and my own brain, the ones from my own brain may be garbage, and if so please let me know. So apparently a light bulb is basically a weak implosion grenade. Problem is, you need a massive object to create a small implosion using this. I don't know anything at all about quantum teleportation, but would it be possible to cause everything within a small radius to teleport a ways away and therefor create a temporary vacuum? Or even just all gas? (if the teleporter is required to be larger than the materiel being teleported, or things have to be controlled this obviously won't work, but if you could teleport a sheet or a polygon.) Another idea I had was create a black hole, problem here is first you need it to decay immediately, I don't know how fast hawking radiation would cause a smallish black hole to decay, but I'm somewhat certain if it pulls things in it won't decay fast enough to stop it from growing massive and killing everything. And if we have this technology send a drone with the biggest black hole generator you can. Final idea: Somehow convert all matter in the area to energy, this would also have the advantage as a weapon of causing other damage, but would that have to end up as basically a nuclear grenade that wouldn't actually work because most matter is to stable? I'm probably over-thinking it, but I was curious if implosion grenades were theoretically possible, and if my brains processes are worth anything or garbage?