Kids are putting Drano, tin foil, and a little water in plastic drink bottles and capping it up - leaving it on lawns, in mail boxes, in gardens, on driveways etc. just waiting for you to pick it up intending to put it in the rubbish, but you'll never make it!!!
If the bottle is picked up, and the bottle is shaken even just a little - in about 30 seconds or less it builds up enough gas which then explodes with enough force to remove some of your extremities. The liquid that comes out is boiling hot as well.
Don't pick up any plastic bottles with a cap that may be lying in your yards or in the gutter, etc.
Pay attention to this.... A plastic bottle with a cap. A little Drano. A little water. A small piece of foil. Disturb it by moving it; and BOOM!!
No fingers left and other serious effects to your face, eyes, etc.
For verification and more information, click on: http://www.snopes.com/crime/warnings/bottlebomb.asp