Do Not Be Alarmed!

I woke up one day while I was sick, and opened the door to put the Do Not Disturb sign out for the maid. And there was huge black smoke billowing past my door. I was a bit alarmed, so I went out and took a better look. It was incense. When you burn frankincense, you actually burn it. I mean, you literally set hunks of frankincense on fire, and then get it going like coals. It's a bit disturbing the first few times you see it. My roommate lit some in our room one day, and we were worried it would set off the fire detectors. But it didn't. Which almost worries us more!