We don't know what it is, but there's always something a bit surreal about watching random famous people calling up their famous friends for a chat on the phone.

That's essentially what happens in the BBC Radio One game "Stand Up, Sit Down," which sees Spider-Man: No Way Home star Tom Holland and DJ Greg James taking turns to call people in their contact lists and predict whether they're – you guessed it – standing up or sitting down at the time of the call.

Yes, it's a simple game, but the cameos – which include Stormzy, Greta Thunberg, and Timothée Chalamet – are a delight.