Ms. Wally claims her spot
It didn't really matter to her that it was in a pile of stuff we were getting ready to trash. What was important is that it the stuff had just appeared in that spot and it was, even temporarily, a center of our attention. That made it a high cat priority, and Ms. Wally was there to seize the moment. Did the empty bag of Whiskas cat food play a role in attracting her? Your guess is as good as mine.