And for as many "mother of the brides" that I've had to deal with over the years, I think that's awesome. In fact I'd make sure she was standing real close to the cake come explosion time........ok ok....I'm evil, mean, cynical and I have an attitude problem.........but it's fun just thinking about it.
Actually, on a slightly different topic, while I respect the whole "extreme cake" trend, made popular mostly by Duff Goldman; as a pastry chef, I also have respect for the fact that we are working with a media called "food".
I really don't believe that food should explode (intentionally) or have moving parts, or emit "smoke" or "lava" or any of that stuff. I mean, that's just MY policy personally. If customers ask me to do it, I won't. I'll refer them somewhere else. I believe you have to sacrifice a lot in taste when you have to construct a cake to be a shape that can possibly be unstable. The choices you have in the type of cake and fillings you can use is very limited, and I think, that if a cake doesn't taste great, why bother? If someone wants something to explode at their party, why does it have to be the cake? This is something I just kind of don't get.
No offense to you or anything rat, I hope you pull it off.....and even better, post pictures!