What is a better icebreaker for a best man speech than this?

I was best man at my best friends wedding and had an awesome icebreaker. I handed out keys to as many men as i could. I was then supposed to hand one key out to one ugly fat woman in the end but couldnt. Then , when it came to the speech I said ' Congrats to emma and chris for performing their vows, but i think we should sort something out' . Then asked all the people in the audience to hand back spare copies of emmas house key. Loads of men came forward and plonked keys into a jar i had that made a nice 'ting'. The last man was an 80 year old with a walking cane. Then I asked for chris's spare copies to be returned. No one came, I asked again. Then slyly added my key to the jar. This was the best icebreaker i have heard of, I cant find any better and i havent heard of any better. The punchline is , that Im now best man for my brothers wedding, and he knows this trick. What can i do? help!