Brad Smith is creating NES and game development information and tutorials, music, games. Just recently he made a techdemo based on a strange GIF of a stack of Captain Kirk’s face(s) doing his famous “Khan!” scream. If you want to know more about how this kind of efffect has been realized in khan.nes, we suggest you to check out his page.
https://pdroms.de/nintendo-nintendoe...o-nes-techdemo
