User blog comment:Drakan95/Ötzi vs Fred Flintstone. Epic Rap Battles: Cartoons vs History. Season 1 Premiere/@comment-24993461-20150503193351/@comment-24993461-20150503215309

I don't think you would intentionally copy them, but "insects in his tummy" or the your ass/-per axe rhyme might have been influenced by them.