You try and cast a spell, but you couldn’t decide which one to go with. Ice spells are classic, but the one that turns a full mouth of teeth into marshmallows would be more directly applicable.
In your hesitation, the werewolf leaps at you! You reflexively put up your arm and he bites it. Oh man, that really hurts. Damn. If they do that on an even more vital part of your body, you’re dead meat.
You got bitten. One more bite and you won’t survive the train ride. Plus, there’s a bit of gum on your shoes.