I'm sorry, but I've seen those tricks played on people on America's Funniest Videos and I think it's really mean. If I really thought I'd won and then found out it was a joke, I don't know how I'd feel about the person afterwards. Risky joke.
My good news is I had an all-clear on my mammogram yesterday. Always a little tense waiting for the results. Post-cancer mammos are even more torture than usual. They aren't leaving anything to chance. I take Tylenol before I even get out of the car to go in.