Might have my plate coral does this a lot normal for him.I wonder if your torch got a piece of food jammed up? The only thing I can think of (clearly your tank is maturing well - nice FTS by the way, going to be a bute) is that the fleshy tissue was going wild because it had indigestion. I've seen euphyllia/duncans do weird stuff when they eat. I call it their pooping face (wish I knew how to use all those cool emojis in here )