Can you describe the biggest problem that is right at the top of your pay grade that you have solved?

Also can you list a problem that you couldn’t deal with but your supervisor could because he/she is better trained? What is the most difficult problem that each discipline and trade has ever faced… Like If Dr. Phil was giving Hannibal Lecter therapy. That would be an example of the difficulty class (DC) for each profession, craft, and trade. Another example is like tacking an animal or criminal with tracks covered in light snow. Based on the question