When you're playing the part of a saxophone or a trumpet...

When you're playing the part of a saxophone or a trumpet player, both of which I have done, it would be nice to be able to play like John Coltrane, but you can't. Your job is to do something else. And I'm not sure what it is, but I don't think I'd be acting Niels Bohr any better if I went and studied physics for five years.