(Part 2)My background is in Mechanical Engineering (Applied Physics), but I work in film, in special effects.  Occasionally, I do get to blow things up but, typically they are all show and now go.  But we do occasionally use det-cord and shaped charges to tear things up.  I am in no way a demolition expert.  I have however spent allot of time experimenting burning things with various fuels and oxidizers, and understand how things burn and also how they don't.