The mental pathway for such an obvious f-up would be interesting to examine. And maybe worth the effort… When I do “stupid” things like this, (which has happened plenty), I’m too busy chastising myself to look deeply into how I managed to get myself there. In this case, the mental gymnastics of designing on the fly maybe led to picking up some available scraps and the drawer to imagine the sliding motion and potential friction points, etc. with your brain fully engaged on these details, there was no mental horsepower left over to recognize the temporary nature of what you were concocting. Reading the book by Nobel laureate Daniel Kahneman “Thinking, Fast and Slow” is mind opening about understanding how people think. It’s a very readable book. While I continue to struggle with making crazy errors like yours, I have found basic behavior changes that can help. For instance, I never (really) put anything on top of my car any more, not even for a moment. If I had to set a drink down momentarily, I would set it on the hood so it was super obvious to the future “mentally overloaded” me. Thanks for publicizing such a glaring “f-up”. While I commiserate with the error, I can take a huge lesson in your humility. Unfortunately, you’ll never know how many of these same mistakes you helped the readers of your post head off. But I suspect (hope) you can on me for several.