Several years ago.
It was my on call weekend and I just did a emergency service in the city of Hamilton. I took a break in the lakeshore park, saw two Chinese ladies were looking for something and they looked panic.
I asked" do you need help?"
One lady said: " I lost bundle of keys including cars key in this park, please help us finding it!"
I asked if they took coffee break somewhere or opened the purse looking for something before and dropped the keys accidentally?
Then I used my strong common sense helping them found the keys which was hiding behind a rock where they took a break before.
The lady was so happy and thanked me for the help, and they walking to the parking lot then.
I stayed there looking at them and told myself: if she looks back, I will invite her having a cup of coffee!
And she looked back and smiling at me before opening the car's door:)
Clint Eastwood's movie" In the Line of Fire" , he likes the colleague who is also a secret service agent, similar scene which I had:)