This video will show you the concept of copying a key for later use using a 0.3mm sheet of copper and a few volts.

Of course, I'm only joking here. While it is possible to take the imprint of a key and cut it out later (if not done instantaneously at discharge), this is not meant to be a practical approach. Do not attempt yourselves.

Now please excuse me while I tend to my hands with a bag of ice.