We've all made terrible mistakes in our jobs throughout the years, but some are worse than others - which makes this Twitter thread all the more amusing.

By now, no doubt you've already read the top entry which involves an 18-year-old Irishman high on ketamine being stuck in a room with Mary McAleese (if not, read it here) - but there is a wealth of entertainment elsewhere on the thread, some of which we've highlighted below.

It all began when the b3ta Twitter account asked people about their worst work-related f**k-ups, and the results... well, you can see for yourself below. Prepare to cringe, laugh and howl.