For a while the self-slamming doors, strange stench and haunted bedrooms are scary, but then boredom sets in.

The repetitive swarms of cannon fodder soon numb and boredom sets in.

For all that effort, though, boredom sets in.

Inevitably, boredom sets in and enthusiasm dwindles - a reason why 60 per cent of exercisers throw in the towel within six months.

After that, boredom sets in.