I heard my two lovelies belly laughing over and over so curiosity got the better of me and I (stupidly) decided to go find out what they were up to. I went to the patio where they were and saw the two of them sitting there holding a clear plastic tube, just laughing their heads off. I should have known that they were up to something gross but like a fool I asked them what they were doing.
They were so proud of themselves because they had come up with a new invention...the fart tube. Yep, those two morons were placing one end of the tube near the business end of their hineys and the other end of the tube up to their ear, and they were letting loose with the bellow of the barking spider.
On a side note: I was going to try and illustrate what the two of them were doing but I just couldn't make it work so I borrowed the above images from Google, then adapted them to show you what they did. Here are my two lame attempts at drawing the scenario. By the way, the first image is of an ear. The second is of a person sitting with a tube near their hiney. Just in case it was as unreadable to you as it was to me.
I don't think I'll quit my day job to be an illustrator.