Have had multiple deer encounters. The scariest was one was on a long curved downhill at 40 when one ran out in front of me about 10 yards ahead. It I was a second faster...
The other was a couple of weeks ago in another heavily wooded going downhill at 25. This one didn’t run out in front of me but was less than 5’ away on the side of the road. We looked each other in the eye as I went by. Fortunately it didn’t startle.
I did not call out, “On your left”.