BTW, my formal shirt (that's what I wear for conference presentations - not joking)
And this is one of the most embarrassing situations in my life (or I wish - I've been in far more embarrassing situations...): I was taken by surprise on the next day when they told me to give my presentation for the second time:
I know that the flowchart symbols don't strictly follow the standard, but they've been adjusted to the audience. And even in the parade version I seem to be one of those persons who just cannot look smart. I don't know what to do with my hair. It always falls apart, so I constantly have to put it back in the hair band; I lose hairbands, have to buy new ones at random kiosks and end up with some bright-coloured stuff for children in my hair - e.g. I had a hairband with a big teddy bear wearing a skirt (the bear wore a skirt, not I) on my presentation at the world-largest physics conference in Japan. And, yeah, I know that my nose looks like an alien from some idiotic Pratchett's book "The World of Noses", living on my face, but remember that... I have a very particular set of skills, skills I have acquired over a very long career, skills that make me a nightmare for people like you.... if you make jokes about my nose, I will look for you, I will find you and I will ...