When you say "aren't the same," (let's assume it is true) you actually mean that the probability of a similar reaction happening at any given time is really low.
But space is big, the universe is old, and if there was a non-trivial probability of a cataclysmic occurence happening when the LHC's switched on, it would have had happen, and it would have been spotted, somewhere.
Now that I think of it, Supernovæ might actually be alien-built Large Hadron Colliders ...

A 'centrist' is someone who's neither on the left, nor on the left.