Although scheduled for all-night duty at the station, a police officer was relieved of duty early and arrived home at 2am - four hours earlier than expected. Not wanting to wake his wife, he undressed in the dark, crept into the bedroom and began to climb into bed.

But just as he pulled back the covers, his wife sat up sleepily and said: 'John, would you go down to the all-night drug store on the next block and fetch me some aspirin? I've got a splitting headache.'

'Certainly, honey,' he said, and feeling his way across the room, he got dressed and walked to the drug store.

As he entered, the pharmacist looked up in surprise. 'Hey,' said the druggist, 'aren't you Officer Jones of the 8th District?'

'Yes, I am,' said the officer.

'Then why are you wearing the fire chief's uniform?'