Either of them using a bell? I use mine a good bit in a precautionary manner on my commute. A couple of underpasses and some spots where people go different ways. One of these I had a collision with another cyclist on a couple of years back when he just never looked my way and pulled straight across my track as I am coming down hill at speed I could not avoid him as there were also pedestrians on the track. I now ring the bell approaching the junction so people will at least look my way.
Cyclist #1 had a bell (not a very loud one) but think he only used in entering the underpass. I couldn't do the commute one - use it for just about everyone I pass (apart from people with headphones on).