this effect :|?

[Compass]

http://www.youtube.com/watch?v=vHW5XKrYCpk

at the beginning of the the video you see a blue foggy effect! how was this done?

[Matie]

Do you mean the mist ball effect?

Here's a great tutorial about it:
http://skribblerz.com/tuts/ngle/ngle2/mistballeffects.htm

[Titak]

Moved to TRNG section since that effect was created with TRNG. :D

Btw, if you want to use it on a pushable, the pushable won't be pushable anymore when this effect is applied to it. ;)