Shattered Glass tutorial Blender Guru

Hello there.
I am doing the shattered glass effect tutorial. http://www.blenderguru.com/create-a-shattered-glass-title-animation/

But already in the first few minutes I stuck.
At 5.13 He sets the gravity to zero. And in his tutorial the particles just go floating in one direction. ( as you can see in the tut ) But when i zet the gravity to zero. My particles just go everywhere. It seems that they are no longer bounded to any force and just go their own way. But in the tutorial all his particles go in 1 direction.
Please help?

Some how you have the Velocity / Randomness set already. Look at the tutorial beyond where you stopped for Randomness setting.

be very lıght man okey