Photograph Silhouettes - How?

[Mp4]

Hi all,

I've got to take pictures of Silhouettes for college but I've never done this before. how does one achieve it & can a flash be used?

 

[Mp4]

Thanks all ill give it ago in the weekend and i shoot in raw always

 

[Mp4]

^ i do own that book cheers ill take a look at that too!