What I have been learning in my training sessions:

Crossfit Fun....


Push Press

Kettle Bell Swing

Wall Ball

Best Way to Do a Sit Up

Air Squats

Standard Push Up

Pull Ups and Dips....and NO I haven't done this weighted.... I barely do it regular

Here is a video of what a WOD looks like...supposed to do whatever the sequence of the day is at the fastest time you can complete....
http://www.youtube.com/watch?v=Q71NLXuh6JQ

A different type of WOD where you stay at each station for a prescribed time frame:
http://www.youtube.com/watch?v=iiO24RhqvNQ