Banjo, if serious, I think one, you do some research, and two, you get a sense of humour. Let me explain. Junior Morias is black, well built and very sturdy looking. A Black Mariah was a police van used to carry undesirables to and from prisons/courts, which was well built and sturdy looking. Do you see the connection in both words and appearances, no racism there.
Junior Morias is relatively small for a footballer too, and is black, some black people are very good at limbo,(other coloured people can also be good at this too ) so could be amusing to think of him limbo-ing under a door, oh the times I wish I could have done that lol.
BJPIE, yes sorry, I forgot to have my humour gene removed.