One time that I know of.
Just out of high school I had landed a job during harvest at a sugar beet processing plant. I was trained on removing and sharpening the blades that skinned the beets. Got 2 weeks in, by then I was considered the lead of the group by our super as I was outperforming everyone. It was easy because removing, sharpening and replacing those blades was the ONLY job we had to do, and it was constant. So I would challenge myself, watch the clock and try to change a machine out in 30, then 25, then I was just blazing each unit out at close to 20 minutes each and being safe along the way. I was the only whitey in a group of a couple dozen Hispanics.
Well, low and behold 2 weeks into the campaign and someone's buddy wanted in our group from another area, and I overheard them talking to the super during a break to "get rid of the white boy", which my super said I was a good worker and kinda sorta defended me, but again came the "fuck the white boy" comments, and "take care of your own". After lunch that day, I was removed from my position and they tried to place me in the lime kiln where the other kid had been. The lime kiln was for people who had a death wish. Lots of accidents down there, many dangers waiting. I said no thanks and walked out of the plant.
That kid quit the plant completely a couple days later. I know this because they called me back to work the following week, but I declined.
I was super pissed on the way home, and told myself just to work for myself and fuck everyone else and their bullshit. Still doing just that.
But its okay, because I know their racism wasn't directed towards me because they thought I was inferior. Fuck no, I was out working all their asses and I know they just wanted the white guy who was making them look bad, gone.