This is a video about a 4,000-year-old Sumerian joke: a dog walked into a tavern and said, 'I can't see a thing. I'll open this one.' In this day and age, it is not exactly a knee-slapper. However, we don't know the context, or it may have been wordplay. In fact, it may not even had been a joke (it is from a tablet fragment). Still, it is an interesting video.