1. Make a new document, any size doesn't matter. Now press "D" on your keyboard to reset the foreground and background colors to black and white. Make sure your background is white.
2. Make a new layer and apply Filter > Render > Clouds. Then apply select the background layer and apply Filter > Render > Difference Clouds.
3. On the bottom background layer still, we now want to apply Filter > Sketch > Chrome with 10 and 10 settings.
4. Select the top layer again. Apply Filter > Artistic > Plastic Wrap with these settings:
Now change the layers blending mode to Color Burn.
5. Now select the top layer and press Ctrl+U. Time to add some color to our graphic.
Top Layer Hue Settings:
Bottom Layer Hue Settings:
6. Select the bottom layer and go to Filter>Distort>Ripple and set the ripple to Medium at 305%.
7. Select the top layer and go to Filter>Distort>Polar Coordinates and set that to Polar to Rectangular. This will give the gas a cool mist effect to it.
Now your done, play around to get your final image looking better by adding some decorations.
More Tutorials: 
