This clapping hands not only were at the unison, sound bounced back stronger.
The flag on the left is the Cusco Flag since 1920, the flag on the right is the one from Perú.
In 1534 during the invasion and occupation of the city of Qusqu today Cusco, the Spaniards found the first resistance of qhishwa-ayrnaras and saw between the multitude, objects similar to the flag of strips and pictures of seven colors of the rainbow. The existence and the use of this emblem probably has been from the same creation of Tiwanaku for more than 2000 years. (Source Wikipedia)