It's more than a mistake; it's a case of 'monumental' stupidity.
Repairing the damage will be a 'monumental' task/job.
The class was about modern 'monumental' architecture.
(..) ' You gotta be cheery ' I'll give you a guarantee ' You don't need dough ' You don't need a college degree ' Make sorrow incidental ' Let joy be monumental ' And you'll be lovely ' You'll be as lovely as can be Ah, beautiful! Beautiful! These are not my clothes. (..)1957 Funny Face