You are most likely not completely silent, and you likely have lighting. It is quite likely that I will notice when you're 10ft behind because of any small mec

You are most likely not completely silent, and you likely have lighting. It is quite likely that I will notice when you're 10ft behind because of any small mechanical creak or rock you ran over or such, or because I was looking over my shoulder. I will quite possibly then panic and jump in a random direction and maybe get us both killed. I don't have any training or script to follow for that. I'll respond the only way I know how, like as if I just heard machine guns and bombs behind me. Bicyclists tend to assume others have their spatial processing and just naturally know what to do.