The number of players is decided by the challenging team, but it's never less than 20 or more than 40. The batsman - who doesn't wear shoes, let alone shin pads - doesn't run himself. He has a bunch of younger islanders who do it for him. Every time a batsman is out, not only are there chants of triumph but also some provocative macho dances, before he's replaced with a batsman from the opposing team.
Umpires use their whistle for any number of reasons (including just the sheer joy of being alive), and games continue for an indefinite number of days, before the winner is decided by a mysterious process that seems to be known only to participants.
One report of a 35 a side match says pseudo karate routines, obscene speeches, ridiculing and teasing are an essential part of a good game. There's also a women only version! And in both cases, the match is played for food...which the losing team have to fish for.