My first thought was that he was brushing fairy(mine) dust onto Henry who was standing next to him. That would give Henry magic.
So Rumple is now a coward, the Dark One, the Beast and the Crocodile. Is he all the villains rolled into one?
The Rumple thing kinda bothered me. I liked the tie in with him being the Crocodile, but was annoyed that he was yet another role from a fairy tale. I hope it's not something they keep doing. He can't be everybody.