Plant vs. Mushroom

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: