107
You take the grenade from your pack and set its variable timer to detonate ten seconds after the pin is pulled. Then you wedge it between the door handles, ease out the pin, and run for cover at the end of the corridor. The grenade explodes with a flash and a dull boom that rips both doors clean off their hinges and fills the corridor with acrid, grey smoke. You rise to your feet and wait for the smoke to thin out before you head back towards the smouldering remains of the doors.
