Original: A distinctive trait of Valencian pilota is that the spectators are often seated or standing very close to the court which means that they may be hit by the ball and thus become an (unwilling) part of the game.
Simplified: A distinctive trait of Valencian pilota is that the spectators are often seated or standing very close to the court which means that they may be impacted by the ball and thus become an (unwilling) part of the game.