These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Fridge Brilliance: Megan uses the camera flash to blind and distract the werewolves. As she's actually a werewolf and doesn't want to hurt her packmates, it makes sense she'd use a non-lethal Improvised Weapon rather than borrow a firearm from the squaddies.
Hell Is That Noise: Sarge's section is shocked to find Ryan's camp a bloody mess and have only been given a few cryptic warnings about what happened, which unsettles them further. Then they first hear the werewolf's howling noise off in the distance.
Game of Thrones fans might now recognise Captain Ryannote Inverted. Given the sheer amound of Liam Cunningham's roles, it was hard not to shout Hey, It's That Guy! when he was playing in Dog Soldiers - he and Sean Pertwee were the only known actors in the entire cast.
Kevin McKidd as the lead seems much more obvious now than in 2002. Justified, since it was the role that put him in the spot-light.