Explosions in blender

I need to make an explosion in Blender for work.

First I used this tutorial, which was only 7 minutes long, and I followed it easily and got the result.

But then I decided it looked too cartoonish, so I went for this tutorial, which was 14 minutes long. So still quite short, and for just double the time, it promised something way cooler-looking.

However, I tried it twice, and what I got looked very bad and different from what I was supposed to get. So I gave it up, and decided my result from the first tutorial was not so cartoonish after all.

You can decide for yourself here.