Last year, on June 26, I gave my 10% off duty free coupon on board my MAN-YYZ flight to a lead and told him to randomly give it to someone who needed it and that it's anoymous. At the baggage carrousel, the lead pointed me out and the person thanked me and I smiled and said, "you're welcome". That was fun.

I also gave a bunch of certs last June to a MLL in YOW. But, don't know what happened in the end to that...