I had one call me about waterproofing my basement. I let him go on with the whole speach before informing him that I lived in Florida.....seven feet above SEA LEVEL! Sadly, he was deeply dissapointed.
One called my sister-in-law one morning when she was really sick - hubby and I had spent the night there because we were worried about her - she insisted on answering the phone.
She said: "We don't need any, we $hit in a bucket!" and slammed the phone down.
You can guess what they were selling.