Yeah it's pretty crazy. Darbian is actually one of the calmest runners playing at a high level too, he seems to slip into some kind of zen state when he's playing.
I started running smb1 a couple of months ago and discovered it's a very hard game to keep your shit together. That 8-4 music turns me to spaghetti.
You gotta see Darbian fails, check his heartbeat rate when they happen.