Jopsy Pendragon and an anonymous user.
 
The following is a particle system based on two scripts by Jopsy Pendragon from the particle laboratory and modified by a user that wishes to remain anonymous.
Two primitives have to be used:
[WaS-K]-JP,Anonymous Jet which has its local  -positive axis oriented toward the ground.
-positive axis oriented toward the ground.[WaS-K]-JP,Anonymous Ripples which has to have its  -positive axis aligned on the global
-positive axis aligned on the global  -plane.
-plane.