I agree with crim. The rocks would never go into your inventory, they go from the ground into your unarmed hand and instantly towards the enemy, you would NOT have to get rocks before and you wouldn't have to go to a special place to get the rocks. Rocks wouldn't appear as read dots, it would be assumed that there are small rocks and pebbles all over the ground in runescape. You could NOT pick up a rock and keep it for later.