Standing On The Edge Of The Black Hole
The Large Hadron Collider is being started up for the first time in June, so if you find your world being mysteriously sucked towards Switzerland that may well provide the explanation.
The machine is located outside Geneva at Europe's European Organization for Nuclear Research, or C.E.R.N. for short (don't ask). The machine is a particle accelerator, designed primarily to study proton-proton collision (and the occasional heavy ion), hopefully proving the existence of such things as the elusive Higgs Boson scalar elementary particle that could link up a variety of fields of thought.
Until it's fired up however, it's all theory - and some parties are worried that collisions by such previously unexplored energies could lead to disasterous consequences, with micro-black holes and stranglets seeming like potential side-effects. A stranglet could potentially convert the Earth from Ordinary Matter to the Strange Matter that typically makes up a Quark Star, and would not be cool (see Ice-Nine for more info).
C.E.R.N. themselves have gone so far as to address the potential 'issue' on their website and seem confident that an earth-obliterating scenario is unlikely - as the black holes they are generating are likely to be merely 'modest' in strength. Phew.
12th Apr 2008 - Tumblr