Speaking of http://www.nature.com/news/lhc-sees-hint-of-boson-heavier-than-higgs-1.19036. I understand that such a bump can be a statistical fluctuation. What troubles me is that the bump has been seen in two completely disconnected and independent experiments. How can this happen by chance? Is there some systematic error that has been overlooked by both of them? Is there any common mistake in background subtraction?
I rolled two sixes in a row when I sat down once and rolled a six sided die five times. Same thing happened to my friend once! Instead of asking how that can be, you can just ask about the chance of that happening.
When the chance gets too small you are starting to get good evidence that something is going on. When the chance is too high, you have to accept that these things literally happen every so often.