The Story of Mel, a Real Programmer (1983)
cs.utah.edu
cs.utah.edu
[1] https://en.wikipedia.org/wiki/The_Story_of_Mel
[2] http://zappa.brainiac.com/MelKaye.png
[3] http://www.librascopememories.com/Librascope_Memories/1950_-...
In the late nineties he apparently found a bunch of optimization errors in the compiler the company used by spending an hour reading through the machine code. I have seen him read machine code once, and it involved him scrolling by holding the down arrow and stopping every 50 rows for 2 seconds. He not only found the error on the first try, but also found a couple of potential bugs.
(Yeah, yeah... get off my lawn!)