Here is three videoes showing it off, it shows how the metal girders of the Traintracks bends when hit and breaks when the bending gets to hard, and the wood splinters like wood does in reallife
And here is pretty low quality video, but again it show how the wood in the house cracks and acts like real wood:DMM cliff house destruction - YouTube
And the last one, it shows how the metal bars on a crib reacts to presure:
DMM Physics - YouTube
Never seen this engine get any use in newer games, so i guess theres better sollutions or realistic breakable stuff arent that important.