My girlfriends mom gets offended if you try to disagree with her in front of other people. She will pull you aside later and try to get you to apologize for embarrassing her so badly.
Told her that her kids would be seated at the kids table, and she freaked out that they were family members of the groom and shouldn't be shunned... So we immediately said we'd change the seating plan so they could sit with her, to which she got even MORE offended because she didn't want to spend the reception with a bunch of children and demanded she be with adults only.
My girlfriend wouldn't speak to me for 12 hours because I said her cat impression wasn't convincing.
Via Reddit and McDonalds WiFi: https://www.reddit.com/r/AskReddit/comments/549fo7/what_is_the_silliest_reason_youve_seen_someone/?st=ITHFDTQQ&sh=a3fcd156