How to make slow motion with nikon 5100?

I've seen a few videos with slow motion that is beyond the capabilities of the camera but they still use the same camera. I've looked anywhere and can't find a tutorial. Can anyone tell me how to make a 40 FPS video into a 500 FPS video? I know you have to use after affects (i think) but i just don't know at All what to do.

Real high speed cameras are very expensive, thousands of dollars. A consumer level dslr camera isn't capable of such video.

Certain video editors can slow down video to half speed… Mine does and it's really pretty smooth when finished.

What you want is a camera that's perhaps 10 or 20 times the price of your 5100. No consumer level dslr will give a high priced opetion at the price you paid for this camera.

There's a piece of software called Twixtor that uses a lot of calculations to interpolate frames into footage, creating pseudo-slow-motion clips from standard framerate video. I've seen some excellent skate/BMX videos created with ordinary cameras and this software, but as it depends on how well the software can track the motion in your video, your mileage may vary. I had a chance to play with this software at a friend's studio once, and I was quite impressed. However, it is a bit expensive (~300 for the basic version, ~600 for the Pro version). You can download a demo version (which renders an "X" over your video) at http://www.revisionfx.com/products/twixtor/downloads/ or you can look at free or cheap alternatives:
slowmoVideo (free, Windows/Linux/Mac[with Wine]): http://slowmovideo.granjow.net/
Apple Motion Optical Flow ($50, Mac only) http://www.apple.com/...ro/motion/

The easiest and most appealing way is to record clips from your camera at 60 frames per second. This frame rate allows you to slow footage down and achieve extremely smooth slow mo footage. The best way to do this, is after recording the video, bring it in to your editor, higher end editors like after effects, sony vegas, or final cut. After that change the frame rate to 24, the normal frame rate. This brings everything down and makes it slow motion. Or you can use ttwixtor, but sometimes it adds some frame blending issues and makes it look bad.

This is a good tutorial:

Here is a clear answer, turn your dial to 'M' or 'P' and head to settings, on the left you'll see a P, M, or camera icon, you'll also see a video camera icon just below it, go to that section, and you'll see a bunch of settings, you can adjust your camera's video quality, probably also speed if your camera supports it.