did you buy your bosch drill in a place like this? >> igor: uh, yes. with a 24-volt? we do >> igor: um, no, no. >> henry: pity. it's not really strong enough,@@ that cordless drill, is it? >> now, the problem with tryg to remove all of the tumor is there is some risk, there is some danger, that the operation could leave you paralyzed down the right -- the tumor's on the left. the left side of the bra is responsible for the right side of the body. and there is a risk, if we try to remove all of the tumor, of arm and the right leg. the right >> henry: usually, we have the patient under a general anesthetic to begin with when we make the opening, the cision in the head and the bone. and then we wake the patient u and remove the tumor. so i think it would be simpler and you have a better chancef success if you are awake throughout the whole time of the operation. it makes the operation safer because it makes the surgeon braver, because i know, i can see what i'm doing, because i can see you, i can talk to you, and leg, a that gives us a much, much better chance of removin