Philosophy: 10-minutes in the doorway

As a young philosophy student, I used to follow my professor to his office and ask him questions in his doorway as he prepared for his next class. He only had 10 minutes between classes, but I was asking the big questions. He called these my 10-minute in the doorway questions. I would have loved to spend more time, but it is all he had. Sometimes in life, you only have 5 minutes, but you need to use those minutes asking deep questions.