My father, known to his grandchildren as "Poppop", was known for his fairly quick and somewhat acerbic wit. He was also a pragmatist (wonder who inherited some of those characteristics!)
An example of his somewhat unusual humour was when he bought a mobile phone at around age 80 and then proceeded to try to understand the instructions as they related to the phone in front of him. He annotated one page of the instructions with various questions as to "where?", "what?" and "which?" because the physical phone button titles didn't correspond to the titles in the instructions:
The primary annotation on this second page is on the top right. "total madness" sums up his view of the instructions:
Grav was with by Trilby Media.