Today I've been doing this. Unfortunately I didn't have enough light to make them all good, so everything was shot with 1600 iso (with my camera it means... ass...). But this was only some test-shots. Nothing special and no school-assignment. Just me and Karianne having fun under water.
This just have to be done again - with blitzes! And no 1600iso!!!!
It's me on the pictures, by the way. Pikaboo(!!!!) or whatevz!