I have to say one of the most underplayed scenes in the movie 'Apollo 13' was where Lovell (Tom Hanks) was recalculating a mess of vectors for re-aligning their craft whilst enroute back to earth. Lovell did the six calculations correctly in the same time six men in Mission Control did one each. :-O
To the discerning viewer, that explained why it was Lovell who was in the space craft.
Wade.
Edit: fixed the names as I'd badly mis-remembered them.