180,000 Volt Plasma Cannon

Source: LightningonDemand Youtube

is this used to shrink furniture?

Mostly used as a death ray.

Who has access to this weapon?

Random guy in a warehouse.

I watched that earlier. Do you know why that projectile is shot out of the cannot preceding the plasma?

I think it has to do with anodes and cathodes. You need to 'connect' to something.

It's essentially the worlds largest, most complex, high voltage Capacitor bank switching gear. If marty and doc brown had one of these they wouldn't have needed to climb the clock tower!

Clock towers are for noobs.