Application eating ~840,000,000% of my CPU
The other suggestions are good, I just wanted to ad that percentages higher than 100 are, oddly enough, not counter intuitive.

very simply if you see more than 100% usage (as was explained to me) it is a combination of the number of cores in the processor (usually 2 to 8) and how busy all the cores are compared to some (unknown to me) baseline.

So getting high percentages are not uncommon but in the end a bit confusing as this question illustrates. And honestly what is going on here, specifically, is beyond me as well.