Three things you can do during your viva and it be totally fine:
- At the outset of your viva, when asked how you came to study the topic you can say “well it all comes down to Jon Bon Jovi”, prompting your supervisor to silently put his head in his hands.
- You can pause the Viva to point out a school group wearing Santa Hats walking past.
- Your phone can ring loudly several times because your dad wants to know how you got on and you didn’t manage to put your phone on silent.
I think it would have been reassuring to know this in advance, please add more in the comments!