The classic Hand Circle / Gotcha / Made you look..... (I have no idea when the game is actually called) The hand is just one i downloaded, i made the stand to fit the hand so that it can be stood up the right way round, and it also just looks really cool :-)
I scaled this hand down to fit 150mm Z-Height as thats the max build height of my printer. Also obviously print hand standing up on its wrist.
Enjoy, and go get your mates with it :-D
I printed this without supports, but it might be a good idea to use some supports where the underneath of the 'Circle' (finger and thumb) are.