disclaimer:This is not an attempt to start anew a conversation as to what is the appropriate warning to use when approaching walkers, a topic that as been discussed multiple times.
I went for a walk the other night. and was much surprised to heard the phrase "on your left" behind me. What I found interesting is that my body went left even as my brain said go right. It was if my instinctive physical response overrode or rode over(weak pun intended) what I knew to be the correct move to make. Weird!
Do you think you would have done the same if you heard a bell instead of a voice with the word "left" ? I think bells are usually better