Sure the door was stuck. And Spike was a fluffy bunny.
The girl had thrown a knife at him before he could say anything else. And that was not funny.
Spike caught it in his left hand, by the blade, and felt the flesh slice open. He winced, and his face shifted and changed, eyes turning yellow and fangs extending. "WHO IN THE BLOODY HELL THROWS A KNIFE?!" he yelled, a low growl in his throat escaping as he whirled and started after the girl, the knife in his hand being twirled idly now.
Now he really, REALLY wanted to see what not having a soul felt like.