One could take this as an incredibly light hearted joke about Usain Bolt's otherworldly athletic talents, or, you could take a deep dive down the rabbit hole of extreme political correctness and militant intersectionality, and take it as an unforgivable insult towards black people and an inference that they are only good for carrying rich white women around.
The Holocaust saw 6 million people die. The showers installed at the Auschwitz memorial are keeping people cool in sweltering heat. Let's have a bit of perspective please.
Joss Whedon says it wasn't the militancy that led him to quit Twitter, it was the noise. But that's the thing. For anybody who cares about equality and justice, but who doesn't reach the level of ideological purity -- because how can anyone? -- the militancy is the noise.