Lunar Lancer - Grappling Hook Glitch

I found a glitch with the Lunar Lancer's grappling hook when messing around...

It's pretty useless but I wanted to report it either way. I made a video and posted it as unlisted so here is the link:
https://www.youtube.com/watch?v=JaGK...ature=youtu.be

(Youtube destroyed the quality and lowered the audio for some reason so I'm sorry in advance)