Introduced in 2006, the MagSafe connector from Apple was a magnetic port on MacBooks that allowed the power cable to easily disconnect from the laptop in the event of someone tripping over it or accidentally tugging it, to prevent damage from pulling the laptop off a table. Apple in their infinite wisdom (or not), discontinued the MagSafe connector a couple years ago, but now you can get the same type of functionality for any cable using the Tug adapter from iLoveHandles.
Tug is a two-piece break away adapter. One part plugs into the wall outlet and the other end part attaches to the end of your power cord. Put them together and you have a MagSafe style connector that you can use for lamps, computers, vacuums, and more. You can buy one Tug for $19.95, or $49.95 for a pack of 3. Find out more at ilovehandles.com