Reminds me of a story I heard from a friend of my parents who is a fireman. Around 8 a.m., the fire department got a call reporting flames inside a house. A man had been walking outside and noticed what appeared to be very bright flames engulfing a room on the second floor of his neighbor's house. But when the firemen got there, things didn't add up. One room did indeed appear to be on fire, but there was no smoke and nothing else in the house was burning either. They went inside the house and up to the "burning" room. It turns out every inch of wall and ceiling surface in the room was covered in aluminum foil. The rising sun was hitting the room in such a way that the reflections from the foil looked like flames to people outside. Why was this room turned into a giant foil-reflector box? Turns out the homeowner was growing about 120 marijuana plants in the room. Oops!
Tinfoil hatters, I've heard of.... but tinfoil "roomers"?! That's a new one on me! :-)