At 37:23, the barman is seen in the background picking up a beer keg as Angel attends to Det. Lockley. At 37:25, the camera switches to show the bar man on his back and trying to get up. Then at 37:27 the barman is swinging the beer keg toward Angel and Det. Lockley.
Towards the end, when Angel goes running past a mirror with Kate, you can see his reflection.
To escape the bar's basement, Kate shoots the deadbolt on the door with her handgun. In truth, doing so would only damage the part where the key goes, and wouldn't do anything with the actual deadbolt that extends through the door frame, thus making it even harder to get the door open.
At about 35 minutes in, Angel looks at a window when we know it is night and sun can clearly be seen. He then says that he and Kate will go through the window (to escape) but if he were to actually do that he would burn to a crisp.
(at around 27 min) During Angel's fight with the worm demon, Angel gets bounced off a wall and you can see a cameraman and camera backing quickly out of the frame in the right corner.