Its a short but cool video. The article it is attached to also gives some history about Hemi engines.

HEMI Article (http://www.automedia.com/blog/post/The-HEMI-Legend.aspx?utm_source=chrisforum%3Cbr%20/%3E)

Also here is a link to a howstuffworks article on the engine as well, just in case you want to know how it works. HEMI (http://auto.howstuffworks.com/hemi.htm)