Ness's Back Air cancel slide

I'm not sure if this has been discovered or not but I thought that I should put it up anyway. If you use ness's back air right before you land, ness will slide a good distance backwards and turn around without lag. If done correctly, you will cancel the back air and hear the first little bit of its sound affect. This can be very useful and can function like a wave dash because their is not any lag. One example of its use is this: run towards your opponent and then do a reverse aerial rush to trick them into shielding. Then, right before you land, do a back air which will will cause you to slide and turn around. Then, you can grab them. Also, if your opponent is on the ledge, you can pretend to retreat with a short hop away from the ledge and then back air at the last moment of the short hop and slide back towards the ledge and grab them. In addition, you can ledge cancel this if you perform the technique close enough to the ledge. Finally, you can simply use this as a mind game by jumping towards your opponent and then using it to slide backwards.

If you have any questions feel free to ask me.
Thanks for reading

Video url is below sorry for the bad quality
https://youtu.be/G2EAbbVtGQY