My first job was as a server at a old person home/retirement community when I was 15. I had to worked the ASSISTED LIVING section, so basically it was seniors that needed nurses or were just real fucked up. I used to have to leave peoples unfinished meals on the table b/c they would think they hadn't eaten and they would demand food after they had already eaten 4 course meals. They used to say that I planted the half eaten meals on their tables and that I was refusing to serve them. It happened all the time.
One time I spilled an ice cream soda on an 80 something year old, oh shit, she freaked out, I thought I killed her.
But the worst was this really old skinny lady that almost never talked to anyone and would always order something crazy like a cracker or a few grapes...something that couldn't fill anyones stomach. Anyway, this one day she was talking way more than normal and she seemed really happy. She said she wanted a sundae with all the works and named toppings and stuff. So, I was happy to get it for her b/c she was a sweet old lady and I was just happy to see her in a good mood and hungry. Next day I show up to work and she never came to dinner. She died that night. I guess she knew she was gonna go.