If someone from behind gives me a warning yell, I tend to freeze up and might end up in a bad crash myself. Cause during that moment I might wonder if I should look back, slow down, stop ...... or ease my turn or whatever. Maybe it's just me. Idk.
Please don't look back. I know people don't realize they do it but when you look you turn. Just keep making the same turns, and let the person behind do the passing.