Amazon.com has posted a short preview of a special feature from the Transformers: Revenge of the Fallen DVD set. The clip is from the "Inside The Allspark" featurette, and includes director Michael Bay, visual effects supervisor Scott Farrar, and other crew members discussing the visual effects behind the robots. Included are several before-and-after shots of robot scenes from the film. We also get to meet ILM animator Charles Alleneck, whose massive Transformers collection you may remember from Conan O'Brien's visit to Lucasfilm a few months back.

The clip is just under three minutes, and may or may not be the entire featurette. Click here to watch the video. Thanks to Nelson at Michael Bay's blog for pointing out the link!