I've never been stopped "on the street" by a cop. But I do remember one time when I was a teenager playing "hide and go seek in the dark" by my house. I was crouching behind a leaf pile in my front yard, wearing a dark hoodie, when a cop pulls up behind me. It could not have possibly looked more like a stakeout, and I knew it. So I stood up and heartily waved at the cop, who looked at me for a moment, then kept driving. There is no way in hell he would have just kept driving if I was Black.
See also this one from 2006 ("They'll pull me aside sometimes because they say I fit the description. Yeah. Young black male. I always 'fit the description.'").