HOWTO force a padlock with a tin-can shim

This short video illustrates a simple procedure for forcing open standard padlocks with a shim snipped out of a tin can. The technique is old, but this is a good, lucid explanation of it. Kids have been doing this for years, but schools and gyms still recommend these broken locks -- and the manufacturers keep making them, which is practically criminal negligence.

Link

(Thanks, Kevin!)

See also: HOWTO pop a combination lock with a beer can