Thanks to Barry Flanagan at Public Speaking for Geeks for the heads up on this video on how not to present at a technical conference. Put together by guys who actually do know how to present, it demonstrates all the worst characteristics of inept presenters.
(If you can't see the video, click here to go to the video on YouTube.)
As Barry points out, if you didn't know this was a gag video, you would think these presentations are real. I've seen way too many presentations like this -- and not just by geeks.