Diving off a Cliff
Find a scenic, tall cliff from which divers regularly leap into the water below. Choose a diver who would look good for your image sequence and ask him to do his best dive for you. Set up your camera equipment so it's ready to start capturing and then ask the diver to leap. Make sure the sun isn't going to cause glare in the lens.
Racing Horse
Show up at a horse race track or a ranch and either have one of the horses there sent on a run for you, or capture one as it's running on its own. If you can get a rider to mount the horse at the track ,this will make for even more impressive images. The important thing about shooting the horse is that it be alone. Sequence photographs work best when focused on a single moving object.
Surfer Riding a Wave
This could be one of the more spectacular and difficult photo sequences to capture. You'll need to arrange yourself on a relatively stable surface that is still close to the surf waves on which your target is riding. Have your camera water protected and ready to start capturing as soon as the surfer picks up and starts riding a particularly large wave. For added effect, you could also capture a finishing sequence of your surfer crashing into the water if he made a mistake.
Fighter Jet Executing Maneuvers
Fighter jets move with extraordinary speed, so this one can be a bit difficult to capture in closely timed sequence. However, if you're at a good distance and have a particularly fast capturing camera, some excellent maneuver sequences could be captured on film.
Rock Climber
Positioning yourself for this sequence could be tricky if the climber is working at very high elevations. However, a good position from a ground point of view could allow you to photo sequence her movement as she climbs from your location to the top of the cliff or boulder. Be sure to stay a good enough distance away from the bottom to clearly capture your climber's movements.