Some people ask me why I have Nothings in the "Basic Trick" category, and the reason is simple. Nothings are basic because they don't involve any popping or coming away from the bike. Your body won't move except for the very strait and simple motion of your limbs moving away from the bike - your torso and center of gravity never change.
The progession of a Nothing involves being comfortable with No Footers and No Handers, and simply combining them together. However, there is a trick to making this progression come more natural.
1) You'll start by jumping your jump of choice and doing your no footers. Familarize yourself with that trick on whatever jump you're using, and begin to just think about taking your hands away from the bike as you do the No Footer. Do this several times to simply acquaint yourself with the thought process of doing a No Footer and a No Hander simultaneously.
2) After multiple jumps of getting into the mindset, begin to open your hands up as you do your No Footer. In other words: jump the jump, do a No Footer, and when your legs are extended, open the grasp of both hands quickly and close again before bringing your feet back to the pegs. Again, do this multiple times to familiarize yourself with the feeling of having your hands and legs off at the same time.
3) When you are comfortable with step 2, begin to take your hands further away when you open them up. At this point you should still be waiting a split second for your legs to open up before removing your hands. The goal here is to break down the individual parts of the trick in order to simplify it and perfect each aspect independently.
4) Now it is time to combine the two parts and do them together. There's no really good way to explain how to do this, but just keep working on steps 1-3 over and over and you'll probably begin to bring the trick together on your own. If you need some assistance, jump the jump and do a smaller No Footer and work on opening up your hands a little as you're bring your legs out.
Notes: You may need to have a slightly forward body position. When your throw your hands off, it is going to be easier to grab back on if you're leaning forward a tad. Once you're comfortable you can work towards getting further back. It is important to always keep in mind that is it usually easier to grab the bars first and then close your legs rather then closing your legs first when you're learning these. I'm not sure why this has always been true for me, but I attribute it to having a better bearing of where my hands are because I can see the handlebars. You can see in the video how I throw my hands and legs off at the same time, but grab the bars again slightly before I close my legs. Once you are completely comfortable it shouldn't be a problem to do it all at the same time. Again, this doesn't always apply for everyone, but it's a good rule of thumb on this trick.