When I arrived at work this morning, there was something wrong about the three lifts that take people up and down our seven-storey building.

‘You’ll have to wait a while if you want the lift,’ the concierge said. ‘We’ve called the maintenance staff. They should be on their way to fix it.’

Above the center lift, the arrow was flashing and the number 19 popped up.

‘What’s floor 19?’ the man next to me exclaimed.

‘Well, they were doing a lot of building last night,’ said the concierge.