SA - Ideas for Opening Sequence

Ive seen on horror films that the colour is sometimes drained out and I gave this a go on photoshop with some pictures. It is to do with the vibrancy, if you put the vibrancy all the way down if leaves some parts with drained colour and others in greyscale. I like this as it is a mixture of black and white and colour, which can help to highlight the important parts in colour.