“Be water, my friend” – the famous saying of the late martial arts star Bruce Lee became the clarion call of young protesters waging their fight against the extradition bill as they staged a shape-shifting guerilla game that crippled Hong Kong government operations on Friday.Tech-savvy demonstrators – who had been deliberating their tactics on online forums and encrypted channel Telegram in an apparently leaderless movement – moved in unexpected waves, rolling from one spot to another as the…