York holds on tight and focuses, one hand pressed against the wall... and then phases through and steps forward, making sure Shelley's coming with him. They emerge into the office in the space right beside the door all sneaky-like, and his footsteps at least are soft enough not to be heard above the electronic noises.

Immediately he's making sure Shelley is clear of the wall and any desks or chairs or what have you, then glancing around for something he could use as a bludgeon.