My buddy had been about a 300 yards to my left and said he too saw the buck. I think it was him that spooked the deer.
I will agree though, wild animals may normally do one thing, but there is always a chance they may act differently, especially when scared or nervous. Heck, it's like when a domesticated dog suddenly bites when he has no history of being aggressive.
I'll just be careful next time. I will be in a better spot for hunting during the season and have built up a deer blind with fallen trees on all four sides.
"Democracy is two wolves and a lamb voting on what to have for lunch. Liberty is a well-armed lamb contesting the vote!" B. Franklin