I am NOT NOT NOT saying this was in any way, shape or form your fault or Nell's.

But when I'm turning left on a road with traffic, I signal for a LONG time, and I usually point my finger and waggle my wrist up and down (point to the sky while leaving my elbow extended, then point left, repeat several times). Figuring that the movement will make my signal more visible. Plus I'm always wearing either hi-viz yellow, or a couple of my older winter things are bright red.

Just my practice ... and if it helps someone avoid this situation in the future, that's all I mean by sharing it here.