My sister-in-law had taken a trip to Sweden recently, and come back with this photo of old Viking runes. It conclusively proves that those people had a sense of humor.
Some of the rest of the rock carving appears to tell the story of Torvald the Adventurous who apparently was something of a daredevil.
This set of runes apparently proves the origin of a popular phrase.
Here, Torvald has handed his mug of coffee to Bjorn and said, “Ya-hey, Vatch Dis!“