The MRI radiologist leans back in his chair, folds his arms and sighs, a very tired sigh.

'What's your indication for an MRI on this patient?'

'er, er.'

'"er er" is not a recognised indication for an MRI. We'll scan your patient with pleasure if he has positive neurology, or if he's got a potentially clear cervical spine but you cannot physically examine him within a reasonable time period. "er er" is not in my list of indications.'

'er, er.'