Humour is hard. Especially when you've only got the budget for one person on screen. But the two rounds of TVCs I've made for TOWER have given it a good nudge, and I really like them.
The high point? Getting a Dad joke in. I think they're some kind of evolutionary vestige, from a time when the tribe needed an excuse to stone their old people to death. I love the fact that, no matter who you are, you can't defeat the inexorable urge to make awful jokes once you've become a father. It's hard-coded into your DNA.