Oh right. We did know that, actually.

Katie and Buffy are watching Total Wipeout, which I think is called Wipeout in the States. It's a bunch of comparatively sporty people flinging themselves across a giant inflated obstacle course over pools of thick, oozing mud. They usually spend more time in the mud than leaping the obstacles above. Buffy, on her first ever viewing of the show, has been offering advice to the competitors, "No! You've got to hold on! Slow down! Be careful! Look out!"

Enjoying her commentary very much, Andrew said, "You tell 'em, Buffy!"

To which our cheeky little girl quipped, "I can't tell them, Daddy! THEY'RE ON TV!"