Both replies are dead on. If they don't smell you and you do not move, they get nervous and stomp and the like. It is nerve racking to be still no matter how long it is, but they will usually if you are still continue what they were doing. That being said I did have a staring match with an old doe on year, that after over 15 minutes with a number of doe staying behind her she decided all was not well, calmly turned around and went back the way they had come.
The Tazman aka Martin Price
Founder and President of
Virginia Disabled Outdoorsmen Club