Lots of kids will put dry ice inside a two liter bottle and it will build pressure enough to “pop” open a mailbox. It launches like a rocket for a long distance sometimes.
Once In awhile on the fire dept we respond to kids dumping gas into the sewer. Occasionally it will cause a small explosion that will jar the sewer covers. I’ve been in half dozen of those-
I know some people who accidentally blew up a gas station with a trash bag full acetylene and oxygen. It had a shop in the back where they worked on cars, they took it inside for some reason and when the soda machine kicked on KABOOM.
I remember the acetylene bombs made out of a balloon with a cigarette taped to it. I went to ride with a friend after school one day his pickup had those tweed seat covers and he had 3 of them rolling around on his seat. I backed out quickly and asked him if knew what static electricity was. He wasn't very bright but is still alive today...
(Edit - he became a reserve sheriff deputy years later - I told him if he ticketed me I would tell the judge all I knew but the statute of limitations is long out...)
Yep. Judging by the dress, bike and car, looks like a Saturday “hold my Mt. Dew” neighborhood dare event from the ‘60s, with a Dad sitting on the porch drinking a beer watching the potential disaster unfold? LOL