Every once in a while I get the urge to shoot from the hip (aka holding the camera without looking to see what you are shooting at). This usually happens if there is a situation where it is impossible or difficult to get my face where I want the camera to be.
I am rarely disappointed with the results even though the focus and composition is a complete crap shoot.
These were all taken with my 70-200 at a pretty close distance (hence the super narrow depth of field). I haven't cropped or changed the composition of these in anyway.
I wanted the camera down at the level of the water but I didn't want to dunk down myself and get soaking wet. (The first one in this post was taken from above without looking because I wasn't ready. She started to shake and I knew if I took the time to look through the camera and then take the shot I would have missed it completely.)
If you've never tried shooting from the hip, you should! Expect lots and lots of crappy photos but there will be a few gems. And you do get better with practice at pointing your camera at things without looking. I'd recommend a wider angle to start as it is easier to get your subject in the photo.