Just your agent's fist. Nothing else. Two fists would also be cool. Maybe boxing gloves? Left click would be a slap and the right click would be a right hook that swings across your screen. Also a plus could be a spiked glove of some sort....

Hello everyone, I am here to wish everyone a merry, merry christmas. I hope you have a wonderful day and enjoy the festive time with whoever you adore. Remember to stay kind to eachother. Happy Holidays \^\^