Tonight in central Munich an American bomb from ww2 was brought to explosion after disarming has failed.
Video of explosion is in the following link.
Interesting points:
The short dry sound and the time delay.
http://vimeo.com/48399328
EDIT: For interested parties: It was a 250 kg bomb with delayed delay fuse conceived to explode several hours after impact in order to interrupt the work of firefighters and rescue workers. Their fuse was constructed in a way to prevent disarming it.
EDITED IN ORDER TO NOT OFFEND ANY FUSE.