User blog comment:J1coupe/Slender Man vs. Pyramid Head. Epic Rap Battles of Video Games Season 2./@comment-6632076-20130807150339/@comment-5613009-20130809184257

I just type in things like Aggressive Rap Beat or whatever and listen to them, to see if they're even and consistent (most of the time) and then write down the time each rapper starts and then start writing my lines based on the beat.