Makes me think just how good movie sounds were when foley artists made them by watching and rewatching the finished film projected without audio in a studio while doing stuff like whacking bundles of celery with one of a half dozen different lengths of 2" dowel to match the picture. Now you have a dude sitting at the same computer workstation as a video editor scrubbing through audio tracks inserting and adjusting the perfectly synthesized "leg_punch_02.wav" file.