A very long time ago, music fans listened to something called cassette tapes. At that time we also had "pencils" that we're mostly used for "writing" and, as fate would have it, fitted perfectly in the tape reels.This ultimate lifehack allowed you to rewind tapes without blowing your walkman's batteries. Or, when the tape came out of the cassette, once again the mighty pencil, would come to the rescue to save your precious music.What a time to be alive!