Aw hell why does the world end on my first day of school? Bloody Europeans, you couldn't end it two months ago when I was engrossed in my dedication to spending as much time as possible in a warm and comfortable bed and would have welcomed the end of the planet as then I wouldn't have had do anything silly; like eat, go to the bathroom, take the occasional shower, or excercise?
(Best summer routine... ever: Wakeup, hygiene, excercise, shower, breakfast, go back to bed. Wakeup, hygiene, lunch, light excercise, go back to bed. Wakeup, grumble, dinner, hygiene, go back to bed until morning. Random bathroom breaks inbetween events.)
As far as the accelerators go... I'm betting on nothing more than a massive release of energy in a small space. No real world-ending event, just really expensive fireworks.