Volley squash
Volley squash is a form of volleyball played within a squash court or similar sized enclosed space with a high ceiling. An 8-foot-high (2.4 m) net is placed at halfway across the squash court and a soft blowup ball similar in size to a football (soccer ball) is used. The game is played by two teams of four players each, and the first team to score 21 points wins. The rules are similar to those of volleyball, but with the ball able to rebound off the walls during a rally (though the serve must not hit a wall).
This sport was invented by 3 high school students in what they describe as 'a fit of boredom'. They called this sport SquashBall. The first world championship of SquashBall was hosted in India in 2019 and ended in a 3 way tie for first. The 3 winners names were Speedo Pedo (China), Chimp the Pimp (India) and Jojo the hobo (Japan).