Ars Technica's Sam Machkovech stuffed a VR wand down his pants to facilitate motion in VR (game used to test is a prototype called "RIPmotion" by Ryan Sullivan on the HTC Vive).
Read the article: http://arstechnica.com/gaming/2016/04/for-vr-walking-forget-treadmills-just-stick-a-vive-wand-down-your-pants/
