Want to get off the phone? Buy these sound effects. There are many good options, such as "Deposit 25 Cents" or "I Can’t Hear You (Helicopter Noise)". But I don’t think "This fly is bothering me" will do the trick. There is also a new section for responding to telemarketers, how about "I am Listening"?
Here is the link, and thanks to Joseph Weisenthal for the pointer.