Might be a stupid video to you, but skip to 0:40 for what I'm curious about... Isn't that the jumppad sound from sauer? xD
http://www.youtube.com/watch?v=fwzTXSIr5XM&feature=related
It's just a stock sound, that's probably where sauer got it from. It's a standard cartoon sound, I'm sure google can find many similar sounds.
vampi is right
the readme for the sounds folder says
The "free" ones are sounds taken off the web, from sites
that guarantee these are free to use & original sounds.
and jumppad sound is at:
free/boing_x.wav
were you planning on suing them for using sauer's sound effects :D ?