My opponent and I both have an icy manipulator in play. At the beginning of my upkeep I want to use my manipulator to tap one of his creatures, but before I can say it, my opponent announces he wants to tap my manipulator. Does the first person to start speaking get to act first? If he taps my manipulator first, then I can't tap his creature. If I tap his creature first, then he wastes his manipulator to tap my artifact that is already tapped. I must be missing something here.