https://motherboard.vice.com/en_us/article/qvaj8q/super-mario-bros-speedrun-world-record-broken

Speedrunner kosmickid12 has broken the world record for the Super Mario Bros. speedrun, using perfect deployment of glitches.

Kosmickid12 came in at 4 minutes, 55 seconds, and 913 milliseconds, shaving a third of a second off the previous record, held by somewessince May. He completed the run on an original Nintendo Entertainment System without using an emulator.