This is perhaps the most stupidly conceived and poorly executed feature of the phone. Apple fails on this one. A big fat F. F for not anticipating that nearly every user who accidentally drags a lazy finger across the display and inadvertently triggers the blow-up mode will naturally assume that his or her phone has gone haywire and is frozen in some weird freak-out state of malfunction.
We have all had experiences with displays that are unable to interpret input signals properly and as a result they show us stretched images, shrunken images, images that are distorted vertically or horizontally. Is it any surprise that when you unknowingly trigger this massive zoom in, which results in a screen which becomes no longer responsive to the touch control you are used to, you freak out and think your phone is frozen? NO.
Apple, you get a lot of things just right. But you SUCK on this one. What happened. Was it Friday afternoon on a holiday weekend when you came up with this? Unbelievable.