Most of us know the feeling. You’re tired, stressed and generally over it all when the doorbell rings to herald the arrival of dinner guests. Slapping on a smile to welcome them into your home, you find that whatever had you otherwise preoccupied melts away. I was reminded of this syndrome when Waleed Aly sat down to interview Carrie Bickmore for Stellar and the two talked about maintaining an outwardly calm and upbeat demeanour while at work, even on days when they are feeling anything but. Carrie: There is something that happens when the cameras go on and the mic goes on that you just switch into that space... Waleed: Pete [ fellow The Project co-host Peter Helliar] calls it Dr Showbiz. Carrie: Does he? Waleed: Yeah, so when you’re feeling ill, just not well or something... Carrie: You just don’t notice it for the hour you’re on air? Waleed: You feel terrible and the audience comes in, the lights go on and Dr Showbiz kicks in. Carrie: [Laughs.] Dr Showbiz… Waleed: And you feel better. Carrie: And then we just cry on the way home. Waleed: [Laughs.] Yeah, silently. Speaking of crying, there were a few tears shed in what was an honest, warm and revealing interview to which Dr Showbiz was most certainly not invited.