We see it so often; a side that appears to be cruising along nicely who, out of nowhere, decide to completely disintegrate. There are lots of terms for it; complacency, choking, frailty, bottle-jobs and many more.
It can be incredibly frustrating for long-suffering fans and in the last couple of years there have been some sides that have been more guilty of it than others.
It's not just an issue in club football though, we see it just as much in international football as well, especially tournaments.
Here, we take a look at the worst five offenders. Agree or disagree? Feel free to comment below.