"Did you finish your walk, then?" lots of my patients asked me after London. Admittedly I did most of the last half at sub-running pace, but nonetheless...
I got lots of "Are you going to do all of it?" and "You can't do a marathon, you're such a little thing." Grrr! I hate it when other people notice that I'm a touch vertically challenged.
And the number of people who told me it would be bad for my knees - I was almost reduced to replying, "There's only one person in this room qualified to talk about knees, and it ain't you". The worst were the knowing nods as I limped through the waiting room with my hip injury.
"I wouldn't want to/couldn't do that," as if it might have occurred to me to invite them along.
My favourite was when I was displaying my medal from the 22nd FLM, and someone said, "Were you 22nd? Well done!" If only.