One of the coolest features about the iPhone 5s is its ability to shoot video at 120 frames per second. Normally, you’ll ned about 24 frames per second to make a smooth picture, so this is almost 5 times higher. Those extra frames can translate into slow motion footage.
In this tutorial from lynda.com, see how to capture a slow-motion shot with an iPhone 5s using Slo-Mo mode. This captures video at 120 frames per second. Also learn about resources such as Really Right Stuff and Manfrotto for iPhone-related accessories.