---I'd already come out of the closet to my mom three times already since she kept repressing it when she let out this gem in the car.
Me: *mentioning something, I forget what, about gay rights*
Mom: Wait, you're still gay?!
Me: *cue sarcasm* What, you're still straight?!
---Also, when I was playing Trivial Pursuit with my mom once:
Mom, reading the card: What culture/time period(I forget the exact question) invented the... (the word was trebuchet) tree-buck-it?
---Oh, also, when my dad first started playing WoW, he was a total huntard. He didn't know that the stable for your pets existed until his character was in the mid-thirties, and he did green quests in vanilla Azeroth until he was lvl 64 before going to Outland. He was also afraid to talk or interact with any other players until his hunter was in the mid 40s. I actually had my main, a hunter, /facepalm.
---My parents had a huge argument when dad wanted to spend around $150 on ebay for a trading card that would give him a new mount that he wanted. That was a huge facepalm moment.