Jack's love shove sends him sprawling gracelessly back onto the door of the bathysphere with an equally as graceless noise of surprise. By the time Sinclair regains his balance, the splicer is already gushing blood onto the cement. Sinclair looks at Jack for a moment of wordless thanks, but even as he does it he's already moving for the door. That's going to have attracted the attention of others, they don't have much time.

He places himself by the entrance to the hall, gun drawn and ready as he takes a look around the corner. He sees nothing, motions at Jack to come forward. Sinclair could be the first one to run out, but he's always been a man of options and right now that doesn't sound like the best one. He'll just follow Jack, if that's alright with everyone.