I have a neighbor, he is by far the smartest person I know. A couple fourth of July’s ago he got a quarter stick of dynamite, and strapped it to an rc boat with a detonate button and a timer. He sent it out on the lake at night, flipped the switch and it didn’t go off. So he took it back into the house to fix it, but never turned the detonate button off. So when it was fixed the 7 second timer started going. It ended up going off in the house and blowing out all of the windows. Everyone was safe.