Originally Posted by
mgw4jc
I like to just do the head pointing, kind of bobbing it toward the direction I'm going as if I'm subtly trying to tell someone to leave a room. Drivers either get it, think I'm challenging them to a race or think I'm trying to get water out of my ear. Either way, they generally wait for me as they wonder, "What is that guy's problem?"
I use my arms if it's totally safe. Other times I do as you say and find it well understood. Or maybe as you say, I'm just confusing them into wanting to stay clear of another crazy cyclist.