It's scary sometimes that previous consultants (I'm a consulting developer) may have gotten an application "working", but have incurred so much technical debt it is nearly impossible to make changes. They've escaped and taken the biggest chunk of money leaving something built on a foundation of toothpicks. Thus the project becomes a ticking time bomb and requires full-time programmer maintenance. You wonder if the next feature request will become the impetus for the collapse- Then you turn into Robert Gates: "I don't know where. I don't know when. But something bad is going to happen!!!"