Kurono refers to Kei Kurono, the lead character of Gantz, the manga series created by Hiroya Oku that began in 2000 and was adapted into an anime in 2004. In Gantz he is forced into deadly missions against aliens, which is why his name is tied to sudden kills in fan edits. The Portuguese wording 'matou um cara' means 'killed a guy' and helped this short clip circulate among Brazilian meme pages and messaging groups, where it is reused whenever any character scores a brutally quick elimination.