Originally Posted by
cyccommute
If, on the other hand, you are trying to get the attention of an idiot, look 'em in the eyes!
The 13W helmet-mount HID was really good for that. When I caught up to drivers who cut me off, I rode right up to their windows and shone my light in their faces. Most people looked embarrassed, most squinted and some played dumb - shrugging their shoulders as if to say, "What, I'm not the only one on the road?".