Ooooh, you guys have me laughing so hard.
I experiment a lot, plus I multi-task. i.e. read a book while watching the stove. So my big failures are around burning the food or modifying the recipe a TCH too far.
The biggest failure my CHILDREN remember was when I was on my last diet. I was a BIG fan of Quark (soft white unripened cheese, no fat) and I tried sneaking it in to everything. I committed the unforgiveable. I modified their Mac and Cheese.
They never forgave me, and forked over their dinners looking for nasty surprises for months afterwards.