I experienced a glitch while using reachability that sends the icons up and entirely off the screen. I dont know exactly what I did to get the phone to behave again, having done all manner of button press. It started when I made icons go reachable, then opened a folder within reach. That opened, but dismissing the folder made all icons rise up and out of the view space of the phone. Multiple attempts at restoring the original position didn't work until eventually the icons returned to their normal home base position.