What's been your latest moment of 'that moment when'?

Mine was: That moment I realized that we had sent our potty trained (but not night trained) toddler to bed without his 'training pants' on. I went to check on him to see if he was still dry and sure enough, he wasn't. Insult to injury little man is fighting off a virus with a terrible fever so he was wet, burning up, and miserable. A quick change of clothes, fresh sheets, and a round of Tylenol later... I'm just glad I remembered before I went to bed! And I would have normally remembered but I had an online chat session with the course I'm taking that made me miss the normal bedtime routine.

How about you?