Sure...pocket knife is fine. Just add it to your character sheet if you copied it down for your own reference.

Here's an example post just so you know how a table top RPG works on a forum:
Player- Nathan walked into the gritty,run down factory slowly. His steps echoed loudly and his heart beat out of control. He moves to the back of the main floor and opens one of the doors that lead into the back offices.

GM- As he enters the room a crazed man leaps out and grabs him, shaking him violently and screaming "Dear God!...One of them is in here with me. Help me please!". Something grabs him from behind and yanks him backwards into the dark. Nathan hears muffled screams and the sounds of tearing flesh.

Player- Nathan turns on his flash light, trying to see what's happening.
(You can't decide the outcomes of uncertain events. In other words if you try to open a door you know is unlocked then its going to open and you'll probably go through it. You can't however shoot at an enemy and know it's going to hit, the GM decides. If you attack someone then you can usually have one small action or movement after the attack then your post ends.If its dark and you turn on your light you don't know what you'll see, its totally up to your GM)

GM- Nathan sees a man that appears to have been skinned tearing into the other crazed man from earlier.

Player- Nathan draws his Colt .45 revolver and takes aim for the zombie before him.

GM- The bullet misses its target and shatters the dry wall behind the zombie's head. The creature takes no notice of him and continues eating the now dead man in his arms.



...well there you go. Any questions?