But it's all right now, in fact it's a gas.
I'm Jumpin' Jack Flash, did you just pass gas?

The story:

At my family reunion we had a talent show as part of our get-to-know-you game. I chose to sing Jumpin' Jack Flash because I love the Stones and it has a fairly easy melody. When I got to these lines, everyone burst out laughing, some to the point of tears. I asked them what was going on, and they told me the correct lyrics. I turned red. It was my most embarrassing moment ever!