Lets see there was, "Do sharks eat us because we look like seals or because they are scared?"
And, "Why did God create Satan?"
Followed by, "Who is the tallest man who ever lived?"
I loved, "If I had $50,000 could I buy a circus?" I have no idea where that came from.
He wouldn't accept my, "No," answer for, "Can snakes bite through glass?"
There is always a math question in there and tonight's was, "How many seconds are in a leap year?"
And right before he went to bed he asked, "Why can I hold my breath and live but if you cut my head off I would die instantly?"