He feels Lin pass behind him and make her way out of the building; she is almost certainly be in the clear now, but he wants to give her a minute or two more to make sure - he doesn't want Harkness following her to the safe-house he has set up, or wherever she winds up going tonight. The mass of shadows slowly lessens, now it's served its purpose, and Koizumi takes something of a sharp breath, a little winded. Such brute force methods come with a price.

Now he has less to focus on, however, the tendrils reaching for the gun grow a little faster and a little larger, working their way inside and feeling around - all he needs them to do is sever the striker, and the gun will be rendered harmless. However, he isn't quite fast enough, and the shadows scream and run from the muzzle flare as Jack fires.

He glances idly down at the bullet, very obviously unimpressed - he hadn't moved or visibly tensed at the gunshot. He raises an eyebrow at Jack, and says, dryly: "How very intimidating. You'll have to forgive me if I fail to cower in fear." The shadows return to the gun once more, and Koizumi extends his awareness more strongly to the shadows surrounding him.