"On your left" usually works for me, but some of the "younger than me" roadies around here just fly past me with no warning that they're passing or even close to me. Scares the crap out of me some days because I don't hear anything until they're beside me.
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The Lord is merciful and gracious, slow to anger and abounding in steadfast love. - Psalm 103:8
I am a cyclist. I am not the fastest or the fittest. But I will get to where I'm going with a smile on my face.