Hey walking on water is a piece of cake...
well, it is if you know the secrets of vortices. ;-)
Oh my God! Sdai was right!
You were expecting left maybe?
Always right,
LOL!
;-)
SDAI-Tech1
PS
Thanks for the link Alcaray. Vortical propulsion is what this earth and everything else is using all the time as well - we are simply looking out of the eye of the vortex and don't realize it.