You have the spinal surgeon on the phone but you can't hear what he's saying there is so much commotion in the room. There are now his mother-in-law, father-in-law, two sisters-in-law and a brother-in-law in the room, all talking at the same time. The noise is so loud you can hardly hear yourself think

'Will you be quiet. There should only be three of Newton's in-laws'.

Suddenly it's very quiet. Order has been restored.

'Eh?' says the spinal surgeon. 'What on earth are you talking about?'