If you short press on the line item, it will show you the max values recorded. Short press on battery current and battery power will give you the max value.
I've actually seen first hand what happens when coolant starts to leak in the battery, and yes, things do indeed go VERY wrong. Here's some pics, this is actually a pack from a Toyota Rav4 EV, which is built by Tesla, and uses pretty much the same design as Model S, but with different sized modules, and the same 2600mah cells that were used in the roadster. We think the actual cause of this leak was a botched repair to the coolant inlet tube on the left side of the back. As you can see, two cells actually went BOOM, and when that happened it blew the top cover off like a pan of jiffy-pop, it even ripped out some of the bolts, and broke some of the brackets that clamp the top cover into place.
wanted to add that I just completed a trip from CO to FL in a record 37hrs, before on the prev battery this trip took me 44hrs to complete, charges faster, and range on this pack is 265mi so brand new range again on it, very happy indeed!
I got the automated "parts ordered" email update this morning. 1088815-01-B reman pack, so no lottery win for me. I foresee extended charging sessions on my road trips. *sigh* They've had it 3 weeks, and it'll be at least another week before I get it back.