Slow down! Am I too fast for you?

This woman in my neighborhood yelled at me from her beat-up minivan today, "Slow down!", when I went home for lunch to pick up some notes for work.
I was going the speed limit and was actually stopped at the stop sign waving her past my driveway when she yelled at me.

I wanted to say "Get a move on!", back to her, but resisted the temptation.

Some people, sheesh.