You're running harder than you ever have before. You can hear yourself panting and the crunch of your boots on the snow-covered gravel. Snowflakes fall peacefully, a stark contrast to the close-quarters battle at hand. Death could be around the next corner.
Toss a flashbang, or not? The sound would give you away, but you can't risk letting the enemy have the element of surprise. If there's someone waiting for you to step into their crosshairs, they'll put you down for sure.
You hear the chatter of gunfire somewhere behind you and to your left. Two frag grenades can be heard exploding, and then relative quiet. It's enough of a distraction that you make your move, and dash around the corner-- only to stop in your tracks at the sight of two enemy combatants. One raises his rifle at you. Your breath catches in your chest. Your heart stops.