I was taken aback by the appearance of one of my interpreters at the conference I attended last week. He looked like an young ex-Marine, like someone who would star in "Die Hard" or some other similar action-adventure flick. He arrived wearing a black skull cap, black cargo pants, and a plain grey shirt (the better to slip in and out unnoticed, perhaps).
True to his appearance, his signing style was very crisp, contained within a tight square of space directly in front of his torso. I'm sure if I measured the angles of the space he kept his hands within, I would have discovered sharp 90 degree angles. All the library jargon bandied about at the conference didn't faze him (though I did catch the occasional raising of the eyebrow at the other interpreter), and I was impressed at the seamless flow of information from his ears to his hands.
The wonders never cease.