Sometimes, I just want to go back to my past. Although I realize that all the sweet memory of the past is inflated, I cannot help it. But you cannot really live in your past again, and perhaps that is the key of its sweetness. Today, however, technology made it different. Taking out the memory of the past has become partially possible, thanks to the development of technology. Simplest way of doing so is just visiting your photo album. I frequently visit websites such as Facebook to recall the memory I had with my friends, loved ones, and family. I sometimes look at posts I uploaded years ago and remember how I was when I was young. Many times I feel that such methods are much better than merely recalling the past in my head. Technology has somewhat made possible of the idea of time-traveling by producing a way to visit the past in more lively and vivid ways. Yet, just like dynamites of Novel, the use of technology of taking out your past, unfortunately, have its side effects. In my home South Korea, there are tons of celebrities who were criticized harshly by the posts or videos they had uploaded before their debut. Everybody say or do something crazy when they are young. I also have memory that I want nobody to see. But since photo album or posts on the internet are semi-permanent, there are potential risks that others can find out your mistakes or action of the past. Posts and pictures that you upload right now can backfire you and be used in ways that you do not want it to be. Use of technology can be dangerous as it is sweet.