Squeezing the innards of a watermelon. The watermelon was close mic'd with an Audix i5 and an AXL guitar contact mic (suction cup variety). Multiple samples included separated by silence. You can watch how this sound was made here: <a href="http://youtu.be/GNeZMUot82g" rel="nofollow">http://youtu.be/GNeZMUot82g</a>