Hehe, same here. And then my Dad would come in calmly pointing out that this house might come in in handy as a place to live in the future as well.

He once really stalled on us, we were stuffing an empty 7.62 cartridge with explosives and he very clearly explained that while he though we shouldn't make fireworks at least we shouldn't use metal parts.

We continued with a small plastic tube and a couple of hours later it went off in my hand. I love my Dad for a lot of reasons.