The "Black Lives Matter" protesters in Boston who blocked highways by chaining themselves to 1,200-pound cement barrels during morning rush hour caused at least one ambulance to be diverted. CBS News, which has the story, says the condition of the patient in the ambulance hasn't been disclosed. Nor does the article mention the race of the patient in the ambulance.
This one is a bit far afield from our usual subject matter here, but it seems like blocking rush hour traffic is a good way to express anger and get attention, but not a very good way to increase popular support for a cause.