Once, while I served beverages in the main cabin, a passenger asked for “a half cup of coffee.” As requested, I poured what appeared to me to be a half a cup of coffee and handed it to the man. He handed it back, claiming there was too much coffee in the cup. I apologized, grabbed a new cup and poured a tad less coffee than in my previous pour.

Source: Los Angeles Times March 25, 2019 12:00 UTC