Two anecdotes:

1. There's a scene in one of the newer Bonds where someone's spelling a name to search for and the computer is listening. The name was "Mueller" or something. Bond (or M?) goes "emm, you, eee, double," – at which point the computer has filled in a "W" – "...ell" – and the machine's smart enough to erase the "w" and replace it with "LL." It's never directly mentioned but always thought it was a clever flourish.

2. Was once working on a shot where a character was miming having picked up a powered off phone and checked what the last call was. In the performance the character pressed "left, down, down" or something, and I had to design and animate an interface that made it work.