Snooze, they lose

Mark left it a couple of days before going out onto the balcony and switching on the disabler. He was there for several hours, prompting the two spooks to race down to the villa from wherever they were based, which Mark estimated was at least a half hour's drive away. They banged on the main door, got no reply, then came round the back, seeing Mark asleep, apparently, on the iron balcony above. They called up and woke him, apparently.

"Sorry, guys, I must've been asleep for hours."

The switch flipped as he went inside, but 'the penny didn't drop!'