Some times, sighted people aren't even aware of what is in front of them. I still remember getting ran into by a 300 pound dude in high school who was jogging as fast as his huge body would let hem. Let me tell you, I have a lot of sympathy for football players. Or, have you ever had your cane run over or snapped in half by a bicycle? That's one of the reasons I got a dog. People are more likely to notice a dog than a cane because I guess it's more unusual.
