What about starting a knuckle popping sound contest?
The goal would be to get the most lovely popping sound. I don't think there have to be real rules since this evaluation is up to each one's taste of "pop"s.
Each contestant would have to send one or several video clip(s) showing her cracking her joint(s). A video clip, not a just an audio file since it might be hard to figure out when the gesture begins. And video is more funny!
What part of the body to crack? Well, why not any one? What matters is the sound produced :D. Everybody's knuckle cracks differently anyway.
The videos would be posted on YouTube. The contest could either last several days or a couple of weeks, or continuously and the 3 best sounds chosen on a predefined basis.
Everybody could vote through a poll on this forum. Each poll choice is associated to the link of the video on YouTube. Every member of this forum could vote.
What do you think about that? Would anybody be interested in participating? Is it technically doable?