The Master flinched when the lukewarm tea hit, splashing his face and seeping into the side of his suit. He had been so absorbed in their struggle that for a good three seconds he was completely baffled by what had just happened. He glanced down to see the broken cup, and realized he was fighting The Doctor in a fucking kitchenette.

Maybe it was the adrenaline of the fight swirling in his brain, or just feeling so drained and delirious from everything... but he began to laugh too. He loosened his grip from around the other Time Lord's neck and slid to the floor, laughing uncontrollably.