Was it really booby-trapped, or did he just make it look like it? Anyone could hook up some containers, electronics, batteries with some wires and switches connected to doors and what ever, without it being dangerous.
I just googled "How to make c-4 plastic explosive"...count was over 3,000,000.
40+ years ago, Soldier of Fortune Magazine had instructions for how to make it from everyday items found in most kitchens. Then there's the more common methods of making explosives....Gun Cotton ....dynamite ...nitroglycerin. The only thing complicated would be some type of remote detonator....oh nevermind, just thought of a real simple one....but not for the faint hearted tho.

Don't worry y'all. I'm getting old and ugly but still plan to make a better looking corpse than some accident prone idiot bomber.

...like Bill Ayers wife.