Once in a while a strong thought arises for me very suddenly at the time of the consecration. Sometimes it will be a certain spiritual insight, and other times a particularly outrageous temptation to distraction.
When I was first ordained, this used to annoy me very much, no matter what sort of thought it was. I was trying to concentrate, to speak the words of institution distincte et aperte and with a clearly formed intention to do what the Church intends, and I was bothered by the idea of being distracted at this most sacred moment. But as anyone who has tried to practice interior asceticism knows, we only make our situation worse when we add an emotional charge or self-conscious judgment to any sort of arising thought.
I've come to accept the phenomenon. If, as my ordaining bishop recently reminded us, my speaking of the words of consecration is the center of each of my days, why shouldn't this be the moment of special graces of spiritual insight? In the same way, why should this not be the moment when the devil sometimes attacks me with his most desperate tactics?