When the Producer shouts to the runners and asks one of them to come over and help

When you walk into the kitchen after the cleaner's been in and it's suspiciously neat and tidy

When the artist announces in front of the client that they kept all the tags in the clothes so that you can return them

When you arrive on set and realise you don't have answers to basic questions like 'Where will hair & makeup be' and 'where are the toilets'

When the Producers talk about how hard transmission used to be

When the client picks up on something you were trying to keep quiet

When a new job gets the go-ahead and we need to decide who's going to produce it