Yep they are making sure Dad gives the correct spin.
I love the line about Hydrogen Peroxide, if I remember other posts it was not common household Hydrogen Peroxide that was used in the bomb. Any one remember?
I think the Dad is taking isolated incidents in JH life to prove how depressed he was. But you could probably do the same in the life of any teen or young adult. Especially if they are under a lot of pressure at school.
I can't cite a source, but I do remember hearing that this is not the kind of hydrogen peroxide commonly found on the shelves of the drug store. Industrial, was that the term? I don't recall.
Household Hydrogen Peroxide is a 3% solution of HP in water. Pure HP can be used as a propellant, it takes a catalyst to decompose it first. IIRC some Air Independent propulsion systems for submarines use something like that.
However the explosive was not hydrogen peroxide, but rather Triacetone Triperoxide (TATP) , which, as you might suspect from the name, is made from acetone and hydrogen peroxide. It's also sometimes called acetone peroxide. It's touchy to make and remains touchy until use (deliberate or otherwise).
Just Google "TATP" or "Triacetone Triperoxide", and you'll likely find how to make it, but I wouldn't suggest trying it a home boys and girls. But it's not difficult, just dangerous.