Haha! You're right, the chart doesn't show every possibility, but I think IBD'ers probably have more variations than the general public - maybe we're just looking more closely!
I would say the pudding poo would be a 6.5 on the chart, and the explosive splat would rank around 6.5 - 7, depending upon how much gas accompanies the explosion.
I also don't see the "no feces," just "chunky tomato soup": tissue/blood/mucous only. That's the worst in my opinion!
We're a sick bunch, aren't we?