http://www.nytimes.com/2009/10/13/science/space/13lhc.html?_r=4&pagewant
ed=all

"A pair of otherwise distinguished physicists have suggested that the
hypothesized Higgs boson, which physicists hope to produce with the
collider, might be so abhorrent to nature that its creation would ripple
backward through time and stop the collider before it could make one,
like a time traveler who goes back in time to kill his grandfather."
 - Steve N