Hat tip Pattie Price
Reports have been confirmed of young vandals mixing Drano, tin foil, and a little water in plastic drink bottles to create bombs powerful enough to sever fingers and cause serious burns and blinding.
The bombs are left in lawns, in mail boxes, in gardens, and driveways. Picking up the bomb causes the reaction to start which occurs in less than 30 seconds.
Verification and more information, can be found on Snopes.com.
My niece was a victim of such a bomb a few years ago. The bottle exploded when she stepped over it at the Skating Rink in Havertown. Burned her skin and right through her clothing. Worse yet, some of it sprayed in her eye but luckily no permanent damage. Cameras were installed after this incident.