"Go!" he shouted, pulling a greande from his pocket. Pulling the pin, he let the door slide open a fraction, and dropped the grenade in. As he released it, a claw sliced his wrist, and he grunted with pain. Jamming a slab of rubble under the door, he started couting, and ran.
"1..." The creatures banged the door.
"2..." The door was forced open a few inches, and a hand poked through.
"3..." The door flew open, as the grenade exploded. Jumping with the blast, he flew into the open window and hit the bottom window frame with a grunt. Pulling himself up, he looked over at the other two, realising he had fallen a floor lowering than he intended.
"The hell you doing over there?" he chuckled. "Come on!" He turned and ran to the stairwell, and begin climbing.