Mach 082...
a small yet increasing number of candidates are not getting through the training providers' checks or the airlines' induction checks. If that happens to you it can be devastating. Resigned from previous job, time off without pay to train, no new job to go to and potentially a $30k bill, sometimes without the crucial entry on the licence.
It still wouldn't be fun if it happens in a bond situation but at least the bill is not your problem.