This is pretty interesting. Hacker winocm has posted a new video of his iPad triple-booting into multiple versions of iOS. The clip shows his hacked tablet booting up and running in iOS 5.1, and then its ability to quickly switch to iOS 6.1.3 and iOS 7.0.6.

http://www.idownloadblog.com/2014/03/25/hacked-ipad-boots-all-ios/