What do you get if you cross a lion's roar with the hiss of a snake ... well, apparently the menacing whoosh of a torpedo speeding through the ocean. (That's how they achieved it for the sound track, we were told.)
The cinema ladies - that's me and my friend J - do occasionally venture out of our comfort zone and last night (with resignation rather than enthusiasm on J's part, I admit) we decided on this French submarine thriller ... 
It was very exciting. 'That was a good film!' said J at the end.
I think it's on Netflix but you really need to see it on a big screen.
And who knew about 'golden ears' - the acoustic analysts who can detect anything in the water from an enemy sub to a baby dolphin?
I'm tone deaf but I did think that here's a film that might appeal to musicians. At least, musicians who like submarines!