When clearing out the garage a couple of years ago just after buying the house, I discovered an old (huge) pressurised weedkiller gun that looked like a flamethrower from WWII. I filled it with some sort of petrol stuff and pumped it up and although it nuked the weeds, it scared the life out of me!
I promptly put it back in its hiding place in the garage. The weeds came back and now I just try to pull them...