Considering sound is just the vibration of air caused by the motion of an object, it shouldn't be a surprise that you can't play guitar underwater. However, Gear Gods decided to give it go anyway, and the result sounds like a super busted version of a chiptune soundtrack. That, or remember those old "X good guitarist shreds" videos? One of those, and if you don't recall, here's one for reference.
[youtube]https://www.youtube.com/watch?v=VDvreuzwZGI[/youtube]