How to Build a DIY reverse flow coffin fog chiller for Halloween or a film

Spooky fog-emitting items like coffins and cauldrons are iconic parts of many haunted houses, but are terribly expensive to buy premade. If you're got some DIY know-how, watch this video for a guide to building a coffin fog chiller for your fog machine yourself for a Halloween display, horror film effect, or just because you like foggy coffins. This thing is a BEAST, it will cover your whole lawn if fog by itself.