xD Okay, Piano Squall Chang is a little hard to explain without showing the stances visually. But basically there are five 'stances':
Piano (hold your arms out with your fingers positioned as if you were getting ready to play a piano)
Gunblade (pretend to hold a gunblade up over one shoulder with a hand)
Standing Ovation (bring both arms up with palms extended upward as if gesturing for everyone to stand up)
Proposal (one hand with palm up as if holding a ring box while the other hand is holding up the opposite forearm)
Moxie (just pretend you're holding a soda can and stretch your arm out as if showing it off like in the group photos)
Everyone starts out in the beginning position, which is just one palm flat and the other hand in a fist (like rock for rock paper scissors) on top of it. One person is the Master. The master starts by going 'WoooooooOO!' gradually making their voice higher, and then on the OO everyone snaps into one of those 5 stances. If you match the master's stance, you're out, and then the next person clockwise in the circle becomes the master and repeats the process until only one person's left. That person's the winner. ^^ The winner gets to be the starting Master of the next game.