One of the fun action/comedy beats of the trailer - Holmes attempting to pick the lock, and Watson smashing it in with a swift kick.
"Always nice to see you, Watson," says Holmes.
We also get the pair squabbling like an old married couple...
"I never complain!" says Watson. "When do I complain about you practicing the violin at three in the morning or your mess… your general lack of hygiene or the fact that you steal my clothes?"
Presumably, he makes no mention of Holmes' heavy opium habit, since they're downplaying that aspect of the character for the film. (Probably wise, given the lead actor's past).