It’s very funy, that in order for me to find some info on “jumping” I have to rely on blogs and other personal sites….
Here is some info on jumping from this blog:
http://www.cloggie.org/proggold/2007/07/11/screw-politics-lets-dance/
and from Wikipedia:
Originally, the gabber dance style called “hakken” was used to dance to jumpstyle music, although it is slower than hardcore; but later a new dance evolved called “Skiën” (to ski). Skiën means kicking one’s feet forward and backward on the bass line, while the torso goes the opposite way (right foot forward, torso back), once in a while lifting one foot significantly higher than usual to indicate a break in the beat. This dance, usually called “jumpen” nowadays (derived from English, to jump), originated in Belgium in 1997 but has seen a real popularity boost in recent years, gaining widespread fame in Belgium and Northern France around 2002 and more recently in the Netherlands. In other countries such as Germany and Austria it has also garnered some interest, albeit among a limited public. The Belgian DJs Da Boy Tommy and Da Rick are often credited with its invention.
It is also called skank but is different from the skank associated with ska and reggae music.
Often another variation of this dance called “Duo-Jump” is performed by two people who choreograph their movements and perform them in unison along side one another. This variation of the jumpstyle dance also originated in Belgium. Some see similarities in the dance style with inline dancing
Jumpers can go to special jump discotheques, often called “Jumpotheques”; for example “The Oh!” in Gavere. Also special events, like the yearly Bassleader-event in Flanders Expo Ghent, are mostly kept in Belgium, but also events like ReverZe and Explosive Car Tuning or Jumping Is Not A Crime(JINAC) do their part in spreading this music style….”
And if you want to learn the steps here is a link to a tutorial:
http://www.youtube.com/watch?v=d0P3uQRXzlM