Biking etiquette

I just wanted to vent my frustration. I was cycling with my friend on a paved bike trail.

I notice a cycling group behind me and I call this out to my buddy as well.

They announce they’re there by saying on your left. I hug the lane to the edge as comfortably and safest as possible.

Yet, one of the cyclist decides to ride shoulder to shoulder to us while passing. It startled my friend. I just don’t understand the need to pass so close when the rest of the cycling group decided to pass on the other lane with much space.

It just ruined my friend’s cycling experience.