make sure you take off the negitive first. but no worrys about taking the battery off. the only way i can even think of possibly shocking yourself is to touch the postive and negitive at the same time with something metal.
ohh and i need to change my battery, i go to the drive ins alot and don't want to have to start my car every 45-60 min. is there any good battery for that. but not expensive like the optima?