Obviously, I couldn't ask them to move the trailer around a bit, I couldn't get any higher than I was to avoid having sky as a backdrop, nor further away to reduce the angle... and having queued for nearly an hour, I wasn't about to suggest coming back later when the light might have changed! I just had to try and do the best I could.
The first thing I did (making good use of the queue time) was do some practice shots of other children on the ride - got a few 'looks' from their parents, but nobody actually approached me or hurled abuse at me...
- Shooting a reasonably wide shot against the bright sky was fooling the camera into giving me silhouette type pictures with a blown out white sky, and no detail of the children's faces.
- I tried zooming in more on the child's face or body, and spot-metering off that. This gave better results, but it was very difficult to pan smoothly with the constant up and down motion - so it was difficult keeping the spot-metering point centered on the child.
- The constant up and down also quite drastically changed the angle of view between the top and bottom of the jumps, making it difficult to decide at what point to set the zoom.
- I also tried matrix metering, but that didn't seem to make much difference.
- I set the exposure compensation up by several notches to +1.7 in an effort to get more detail in the shadows.
- I also tried out 'burst' mode to help get a good shot while panning vertically.
- switch on the flash (d'oh!! how many times have I told myself to use the flash in bright conditions!!)
- switched to manual mode to find a combination of aperture and speed that gave me the exposure I wanted on her face, and stuck with it - rather than have the camera constantly re-evaluating all the time.