He'd been vaguely relieved when the first crisis the Dome had seen in quite some time meant that his and Ianto's planned talk with Spike had been shelved in favour of patrolling and fighting raptors.
Bumping into Spike in the dark instead? Well, it actually makes him freeze for a moment because the reason he wasn't looking where he was going is that he was backing away round a corner from a gang of at least four raptors.
As ice-breakers go, it's a pretty good one.
"Hey," he says, after a moment, as the raptors round the corner too and come into view, shrieking and baring their teeth. He fires a couple of shots and one drops but the rest are getting too close now and he switches to the long kitchen knife (the longest he could find) in his other hand.
"How are you with raptors?" he asks breathlessly, slashing grimly as the raptors dive in.