My son just discovered the slo-mo setting on my iPhone 6. He used it along with his latest obsession - scale model pullback cars - to make some pretty cool video for a project. Apparently, most days at recess they go drive their cars across a crack in the sidewalk behind the school and watch them wreck.
He and I were both amazed at how cool this looks played back at 30 FPS. It definitely has the look of normal sized car crashing in slow motion. At 60 FPS it looks about as if it were an actual non-scaled car. This was shot 240 FPS and played back at 1/8 speed, which makes it look slow motion even for a full size car.