Not the same thing but in my first ever job I worked as an admin person on a research project. I was tasked with organising a conference for about 100 people in Kendal which our staff were to deliver.
I meticulously planned everything- the venue, catering, hand-outs, projectors, name-badges, the lot.
Come the day, we all set off from Manchester at 7am, me sat in the passenger seat of the Directors car. It was halfway up the M6 that I realised I had actually forgot to send out the invitation letters to the delegates.
A really awful sinking feeling overtook me and I had to carry on chatting to the Director, enthusing about the day all the way up to Kendal and into the car-park.
Got there and there was a perfectly arranged venue, fresh pastries laid out, steaming hot tea and coffee laid on, powerpoint and projector at the ready….and an empty room.
Had to come clean after about ten mins of us all being stood there 😳