Recall that turning around in shine will leave you unable to jump out for a few frames.
By turning around in a Running shine and shorthopping or even fullhopping out, your momentum can let you grab ledge fairly quickly. While somewhat easier to execute, this technique is generally slower and worse than Running turnaround-waveshine to ledge.
However, it is still quite fast and safer than options like Side-B ledgegrab. As long as you don't misinput running shine as side-B, you will never self-destruct while performing it.