Not so much gritting & grimacing, just feeling pretty embarrassed.
I tried to give a donation to a "beggar" when he wasn't one at all!
I was rushing around Sydney Road a while ago, doing a bit of late Sunday afternoon shopping. In between the greengrocer's & the supermarket is the spot where the beggar usually are. As you pass, you rummage in your purse & grab all the loose coins you can find & hand them over ... which is what I was in the process of doing today, except this very crumpled looking soul was standing (not sitting on the footpath) which is the usual thing. I also noticed that he didn't have the usual cap or hat for donations on the ground, so I just tried to hand to money to him.
"What am I supposed to do with this?" he asked.
" um ... whatever you like" says I, feeling a wee bit flustered.
At which point we both got it: mistaken identity.
At least he had the grace to laugh!
Me, I just felt like a complete idiot.