Premier Date: October 10, 2003
Only by deliberately weakening the barrel and dropping it on a sharp edge were they able to get the barrel to drop its bricks.
Although it is possible to electrocute yourself by urinating on a third rail, you would have to stand unrealistically close to the rail to do it. In most instances, a urine stream would break into droplets before making contact with the rail.
(This concept was tested with an electric fence in episode 14 and that version of the myth was confirmed. Distance is the key.)
Most eel-skin wallets are not made from electric eels, but rather from a fish called a hagfish which does not produce an electric charge. Data written to a set of test cards was not affected in any way.