I've seen this scenario multiple times hunting and scouting, actually heard it so much that I can do it back with my mouth now. Had a back and forth match with a 6 pointer one time for like 20 mins, he blew or snorted, I immitated it, and he kept on and on. I was in a field with a few doe taking pics and he came out in the corner and started that stuff, finally after roughly 20 mins he calmed down and peeked around a corner at me. My advice is to agree with bow, sit there and be quiet as well as listen and observe. Deer especially during the hunting season are on edge using all senses available all the time, in an area such as you described it could have been a number of things that caused it. Anything from the deer spooking another deer, a coyote in the area, a fox, a strange smell that's unfamiliar, or they could just be communicating with each other as they do use the snort/blow to verify if it's another deer or something else, that's why I was able to go back and forth with the small buck for so long....he was trying to figure out what I was and if it was ok. The only time I ever recommend using this technique is when on foot walking to the stand/blind/hunting spot, especially in thick heavy cover. If you are making too much noise walking in the deer will let you know often with this alarm as I learned often when I was younger. After time I decided to give this noise a shot cupping my hand and usually doing it in a direction away from the deer to allow it to travel a bit before they hear it. By doing this I found I was able to calm the deer to a walk rather than a run and even at times back to feeding along. It's better to practice during off season when you get the chance but if that's not possible the best time is when you get busted on your way in. <-----------my two cents at least.
Browning 7mm 08 Leupold 3x12 fed with Hornady Ammo = Dead Deer
Nikon D7000 70-300mm AF-S = Great Photos