When beginning the surgery there will be a red button on the back of Bum. Rub cream on it to open up the robot. Inside the robot will be tons of acid. Vacuum it up. Click the vacuum down on the little dot near the top of the battery. Once all the batteries are fully charged, burn the little dot on top of the battery to go the next part of the surgery. You will now see a large battery and four broken yellow circuits. Staple the area where they are broken. Charge the area where circuit starts with car battery. Then, charge the large main battery in the robot to end the surgery.
Eddy is the first person that needs the corkscrew. Choose the corkscrew, then the pain medicine. Click and hold, then follow the red thing that is circling around the location where you clicked, while still holding it down. Make sure the pointer is always on the red spot or you will hurt him or create a small cut. When done correctly, this will boost his heart rate. Get rid of all the chips, then chainsaw the collar on the dotted line and remove it piece by piece with the tongs.
You must cut Horace open, fix his heart with the lighter, stapler, and pain reliever goo. Once done, bugs will appear. Take the battery and zap the bugs individually. Patch him up again, Then, proceed to cut him open more. You have to use the X-ray. Cut where you see the dark figure, then get the battery once it is open. Zap the opening until a big yellow bug appears and zap him. Repeat this procedure until all the bugs are gone.