This trick isnt very hard but it needs practice.If you are good at bmx you can learn it in one hour.

I'll tell you some very good tips on how to learn this trick:

1. First you must have your seat at the same level with your knees,so u can catch it.
2. After this a good idea is to put your back wheel next to a fence so it will be jamed.
3. Now it depends on which foot you put in front. For example if you ride with your right foot forwards you rotate the bar only with your right hand and catch it with your left hand.
4. As you can imagine now you lift the front wheel and spin the bar. When you spin the bar you musnt look at the bar. When spining the bar try a lookout for example.
5. After you practiced this it's time to do it while moving. You must do it at a slow speed when you first learn.
6. After a few pedals, concentrate and lift your front wheel but in the same time hold your seat tight with your knees then spin the bar as fast as you can.

These were the tips that helped me lean the barspin flatland.
Also,if you can't do it the first time you try don't feel discouraged. You may have a bad day.  Try it the next day or when you feel you can do it.

And dont forget: PRACTICE MAKES PERFECT!!

Good luck and have fun!!!!