I got it aswell,
Why do they need to hold the floor against the euro? If thing in the eurozone worsen pehaps the SNB would see pegging the CHF against another currency. This would not only be cheaper but probably more effective as the euro is going to devalue ...
spiked just below 1.20100 on mine, not good news.
strong start to London session
I say you have a theifing broker, here is my screen (15minute) . No large spike downwards, not even below the 100 level. image