. >> guest: i had luminary professors like anna freud, and it was really pretty exciting. but when i got to medical school, i said, you know, everybody has special gifts and talents and what are yours? i started thinking about my life, and i realized i had a tremendous amount of eye-hand coordination. >> host: i was going to say, a surgeon -- >> guest: that's key. >> host: it is. >> guest: and the ability to think in three dimensions which is essential because you're dealing with a nebulous mass. and you have to be able to keep in mind where all the tracts are even though you can't see them. if you don't have good three-dimensional skills -- >> host: how'd you know how had that skill? >> guest: some of the jobs that i had done and really performed at extremely well like, you know, working in a steel factory. >> host: what'd you do in the steel factory? >> guest: crane operator. >> host: when was this? >> guest: right after i finished college. >> host: interesting. >> guest: and, you know, you're driving these enormous beams of steel through narrow areas and dropping them i