I remember thinking that blindfolded Punch Out run a while back was amazing, but this is something else entirely. I can't imagine the amount of hours put into learning something like this
Especially because I'm sure there's a lot more that goes into this that we don't see. Like you gotta have backup strategies for when something unexpected happens. You have to somehow be able to recover from that and you can't just always reload a save. That same runner also has a whole lot of blindfolded super Mario 64 runs some of which were also at gdq and it is amazing to watch. I highly recommend.