MAC's comment applied to far more people than just motorists. I've often noticed that pedestrians fail to interpret and react properly to hand signals. For example, here, I related my experiences with school kids that waved back to me when I signaled for a right turn. In that experience, their misinterpretation became part of the fun. After a few speed runs, those kids all knew EXACTLY where I was going to turn.
|Left Turn Signal - The Stodgy, Conventional Approach|
|The "Expressive" Left Turn Signal - Hoping for a Better Response|
|No Pointing in THESE Signals|