Which sports were combined into the 2004 team sport called Bossaball?

Oh my! Bossaball is the ultimate Brazilian fusion sport of volleyball, mixed with association football, and gymnastics! Oh, yeah, it also incorporates music into the game! Looks like something I would fail at miserably but is probably a ton of fun for those with the coordination to pull it off! The Portuguese term "bossa" means a combination of style, attitude, and flair.

One player (the attacker) is positioned on the trampoline, and the others are around him/her on the inflatables. A player from the serving team (the server) throws or kicks the ball into the air and attempts to hit the ball so it passes over the net on a course such that it will land in the opposing team's court (the serve). The opposing team must make a combination of no more than five contacts with the ball to return it to the other side of the net. These contacts can be exercised using any body part:

Volley touch
Touching the ball one single time according to the traditional volleyball rules. With the lower arms, touch, spike or drop shot. Throwing the ball or guiding the ball for more than 1 second is not allowed.
Football touch
Touching the ball up to two times (= double football touch or a DST) with any body part except the hands or arms. Example: One can control the ball with the chest and then pass it with the head or foot. Any combination of body parts is allowed as long as none of the two contacts is with the hands or arms. A DST is counted as one pass.

https://en.wikipedia.org/wiki/Bossaball

To give you an idea how it looks like. Here's a video from the World Cup 2013. Amazing.

https://www.youtube.com/watch?v=CFB_RCewa3s