I rather have a rewind button. I would want one because you could almost predict the future, if you went back in your life you could tell somebody don't get on that plane or they might die or be injured. you could help people. Like you could have gone back and tell people at the Boston Marathon do not go because some guy is going to blow the place up. Also it could make you change your decisions and pick another one. There is no bad things that could happen with a rewind button and no people would die because of wars or terrorist.
