Yeah, we're playing real loose here with the science... I don't think it's that easy to make nitroglycerin - which is what they made, not dynamite, but nitpicking. But it's fun nonetheless. So now... we will blow up the bad guys? Rocks fall, everyone dies? I don't know...
Well the structure of it is stupidly simple.
Making it should be a -lot- more simple than some of the other things they produced.