A chap, professes to be, an expert on 'Wasps & Hornets'- so much so that he claims, to be able, to tell the type just from their sound. To this Ends the 'Produces' a Disk, of wasp (and hornet) sounds. Someone takes it, puts it 'On' and asks him to name the animal. The, so called Expert, can't do so- neither on the next 'Sound' either. Suddenly the man smiles, and says, "I know the Trouble, you have put on the "B" side!!!!
Not much I can say, to that.
AndrewT
Let’s do a funny thread 
Sorry not been here a while - but 
Five minute mindfulness