Why one miner can dig out many blocks continually in one moment? I am new to bitcoin and blockchain, I browed the website just now. There is  a question confusing me,  I find that one miner dig out blocks many times even in one hour. For example, this miner dig out four block in 6:00 - 7:00 AM. Is it possible that this miner control 51% CPU? And may this would break the whole bitcoin blockchain?

I hope someone can answer me, thanks！
I suppose it just a succession of lucky event, even if this miner wanted to do a 51% attack, there is not a lot he could have done with it, except as you said break or reduce the trust in the bitcoin network, and someone who have invest that much money into mining equipment must own and will own lots of bitcoin and so have less incentive to try to break it.