Old Seeker

Sorry cleung for assuming your a newbie to staff. For the wushu thing you've asked, you can use any type of staff, unless you enter a wushu competition. I'm not in wushu, but I practice a Monkey Staff form that has one of the move you've asked where the staff is slammed to the floor.

Unless you are using a steel staff or you are not generating enough power in the strike, you can break the staff, and I'm not talking about just cheap competition staff. The amount of power required depends on the angle of the staff meeting the floor. The more the angle, the less power is required. Of course, one should learn to control the power in the strike, but since cleung ask what seems like a newbie question, I've assumed that he is newbie to staff; sorry if I've made a wrong assumption. I have seen newbies that wants to get the big bang sound will literally slam their staff with as much power as they can and they break their staff. Don't misunderstand, I'm not trying to put any of them down, they are just overly enthuseatic.

Yes, prevent crushing of fingers, but also if you had your fingers of the right hand until the staff, you will not be able to produce the loud booming sound affect. I guess you could produce some sound effect if you tip the staff so that it will not crush the fingers, but you will most likely break your staff. Give it a try with your fingers wrapped under the staff, but just don't slam it to the ground too hard.

Left hand holding the end of the staff with fingers wrapped around the staff. During the slamming down part, the left hand punches the floor, while the right hand on the body of the staff with open palm on top slaps down the staff at the same time as you drop into your stance.