https://www.youtube.com/watch?v=_RI_C9cUIYI - An example of VRS on FSX
https://www.youtube.com/watch?v=HrsGM0PzQFo - Another example with words and pictures. There is actual video footage of a helicopter crashing because of this too if you need to see how it would be in real life.
Here is that video:((((( https://www.youtube.com/watch?v=mP72wdgq5PU&feature=player_detailpage#t=60s )))))
I got my information from wiki, youtube, and some forums about VRS.