Hello Ghouls and Goblins!
3. Your fog machine will line up with the back of the PVC pipe so when the fog goes through the pipe it is cooled and will lay in the grass, giving a more spooky effect.
4. This might be the hardest part, finding somewhere to camouflage your fog machine and cooling apparatus. We had some brown felt laying around so we laid that over our contraption.
Voila, this is how you create low lying fog in your your yard!