• The time he thought I said fireflies needed “human error” [once enclosed in a jar w/ holes in its lid]. (I said “humid air”.) “WHY WOULD THEY NEED HUMAN ERROR?!?” has become a standard response to many, many things.
  
• The time he told me Friday was a two paper day and I said “Why would you buy two papers?” thinking he meant two copies of the same paper.
  
• Graupel. The hot new thing in precipitation. “Gee, the graupel is really comin’ down out there.” “We could be in for some graupel accumulation!”
  

When you ride to and fro every day with the same person, you start to be like an old married couple, in-jokes, irritations and all.