For several months, my indoor Bromeliad plant has been attacked by mushrooms attaching themselves to the wall of the outer leaves. The mushroom seemed to grow overnight and would create a black spot on the leaf surface, making the plant look like a Dalmatian. According to what I read, cinnamon powder can be used to keep the fungi out. So I spread the cinnamon powered around the soil of the plant. For two weeks, I had not seen any mushroom growing until today. This little sucker seemed to pop out of the seam around the plant overnight. I recorded a video here: