The first link is to a well done animated cgi of a demo gone wrong... although the clip is fiction it does illustrate the reality of what can happen if areas are not secured (poor lil car) and if planning is not fully executed.

The second clip was foun on you tube (another one from a different angle can be found there too with the name of the company) I am not sure of the company but I do know it was oversees in the Europe area.