Describe a time when you forgot something important?

Question: Describe a time when you forgot something important?

Happened a few months ago when I had to attend an important exam for my M Pharm qualification. The test strictly required candidates to use black ball point pen to write the paper. I was sure that morning when I left for the exam that I had put two pens in my backpack. However, I was not sure of their ink colours. So by the time I reached the examination hall, I quickly opened my backpack to check. To my surprise, they were both blue pens. This could have resulted in my answer booklet being disqualified and I would have had to re-take the exam.