Ever wanted to destroy a building? Well make your dreams come true with Pulldownit 2.5 for Maya. Pulldownit is a dynamics solver which allows for the creation of fractures as well as massive rigid bodies simulation. By using its technology, digital artists are able to simulate the collapse of buildings quickly and easily, cracking surfaces and/or fracturing any kind of brittle material. I highly suggest adding it to your arsenal of Maya weapons.
Check out this great case study of a building collapse done by Ivan Khmel.
Final Building Collapse: