Well, I hope the title makes sense.

Here's a few that are made by metal bands

Darkness - Invasion Sector

http://www.youtube.com/watch?v=EfAROK38myY

Assorted Heap - In Vain (The Instrumental ends at 1:07 seconds)

http://www.youtube.com/watch?v=PGaHK...om=PL&index=62

Lord Belial - Forlorn In Silence

http://www.youtube.com/watch?v=tL9Zy7uiRp0

Testament - Hypnosis

http://www.youtube.com/watch?v=ifpiGkCsMIY

And more that aren't on youtube.

Yea they make a type of fussion between the metallic istruments and acoustic ones :P