Legally blind doesn't mean "can't see anything", let's face it if you see a blurry shape the size of Shaquille O'Neal approach you it's probably not too hard to guess who it is.In 2019, Shaquille O’Neal also offered a curious anecdote on an episode of Inside the NBA. Co-hosts urged him to recount the time he stood unannounced next to Wonder at an elevator bank in their Los Angeles apartment building. According to the basketball star, Wonder could see him and asked “What’s up Shaq? How you doin’ big dawg?”
Shaq weighs over 300 pounds.It's not hard to know people for example by their walking sounds - or smell.
Shaq being as unique as he is prolly isn't hard to pick out by other senses.
It's probably more plausible that Shaq was talking before he got in the elevator and Stevie heard his voice.Shaq weighs over 300 pounds.
I assume they if he "stood next" to Wonder in an apartment building's elevator bank, that (particularly if he's wearing hard soled shoes on a non-carpeted floor) plus the sound of his breathing coming from a full foot above where it comes from a normal male, would probably be enough to clue a blind person in to realise "oh hey, this is probably the 7 foot tall, over 300 pound basketball legend who lives in the same building as me."