Most of you are probably aware of the multitasking function on iPhones, which is accessed by double pressing your home button. While in this view you can easily terminate any app by swiping up. But if you want to close multiple apps at once, perhaps trying to close them all as quickly as possible, you can close up to 3 apps at a time in a single swipe. Just place 3 fingers on the screen instead of 1 and swipe up...3 apps closed at once.
***Edited to add labels***
