As Childermass shoots him a glare, Strange's expression falters a bit. That's a particularly poisonous look thrown at him. For a moment, Strange wonders if he should tell Lambert off and try to calm this nonsense down...buuuut he's still a little bit grumpy about the whole 'not telling him his future' thing so yeah, Strange isn't going to stop Lambert as he just continues to act like a five year old while Childermass tries in vain to remain an adult.

Besides, Strange isn't the one who's in the running to get punched in the nose. As long as it looks like he'll escape relatively unhurt, he doesn't mind egging Lambert on a little bit.

Still, the game of 'bother Childermass' can only go on for so long as Childermass himself gets up and starts to put an end to the game. Ah well. Honestly, that's to be expected. "Bother me if you need that cold compress refrozen," Strange says, with a little nod towards Childermass. Hopefully the second time he wouldn't freeze half the room while making it.