I'd like to share my VR Swing with you. It's part of my bachelor's thesis "Designing Presence" and build with Unreal Engine, Processing and some Arduino tinkering. The idea behind the swing is to give the user the ability to move in the virtual world without worrying about the cables and reducing the chance of sensory dissonance while moving. I'm myself very sensitive to sensory dissonance, but because the swing's real motion is mirrored in the virtual world it never got me sick.
More about the project and a making of can be found here: http://designingpresence.dennykoch.de/