I was moving a sofa upstairs a while back struggling with one other person and about 6 people walked past us not offering to help, all white. We were actually stuck and couldn't move it around the corner stairwell and these people just squeezed by us. Then two teens, a black kid and a Mexican kid came by. The first thing the black kid did was ask if he could help us. I like these instances where my instincts are shown to be wrong.