The idea was to append Keyboard Cat to the end of a blooper video to play that person offstage after a mistake or gaffe, like getting the hook in the days of vaudeville. The meme became popular, Ashton Kutcher tweeted about it to more than 1 million followers, and more than 4,000 such videos have now been made.

The mood is big city, with flashes of madcap mischief, craziness and devilry on the part of Rabbit and (especially) Rogue; the Rag Couple, sometimes ballroomy, have notes of tension and dispute.

… he was dressed in a badly fitting white drill suit, with trousers bagging concertina-like over clumsy black boots.

Hopf categories in the sense of Batista, Caenepeel and Vercruysse can be viewed as Hopf polyads in a braided setting via the notion of Hopf polyalgebras.