[quote name='CheapyD']I'm always on my best behavior, so if I did something rude, I didn't know it. My guess is that for a gaikokujin, a Japanese person will just stare in disgust and not bother trying to say something.[/QUOTE]
Consider yourself lucky. A buddy of mine, who also happens to be a tall, bald white guy, was almost accosted in the middle of the street by a middle aged Japanese man because he was eating a donut on a street corner in Tokyo. He had no idea what the guy was yelling about and eventually figured out the man's furious hand gestures. He shoved the rest of the donut in his mouth and the Japanese man went on his way. Of course, not without spouting a few Japanese obsenities first.