Oh man, do I have experience now with this ! Cycling home yesterday eve on the canal towpath, pitch black, no bother as I have a pretty good front light. Suddenly, I just about make out a very dark figure approaching, and slam on the brakes so much so that my back wheel locked up. Into my light appears an older chap, on a bicycle, dressed in dark clothing, with 2 dark coloured dogs, one almost certainly being a Doberman, he starts shouting that he can't see anything etc. followed by a FFS !!!!!!!! I initially said sorry, then the brief shock went away, and I asked him where his F'ing lights were, to which he proceeded to call me a F'ing w***er, to which I responded with a few choice words of my own. He got very irate, and with 2 large dogs I thought better of it, TBH I avoid confrontation at all costs anyway, but I was gobsmacked at his response. If he'd had any form of light, I'd have turned my down like I do with all other oncoming cyclists, but cycling on the towpath in pitch black with no lights or reflective clothing and 2 large dark dogs running all over the path is the action of an absolute idiot !
Had a chuckle at it this morning, all captured on my helmet-cam, oh the language !