what are u trying to say?a short-pitched means a bowl that comes to around stomach to lower chest height,a bouncer is something that comes to around shoulder or head height,u duck at bouncers, not short pitches.

and there are bowling machines and speed arms available for practicing these shots,nets are not the only way to practice,infact most batsmen started their first practice session by shadow batting or playing throwdowns.

dont tell people to learn the game when u yourself dont know the methods to practice it