Doorsocks are flexible, snakelike, round, tubes filled with water absorbent material that stops air flow. Typically these tubes are used under doors, window sills, and other openings to stop air drafts, absorb rain or other water leaks, and reduce heating and cooling costs in the home.
After placing a doorsock against the inside of my front door the uncomfortablechillyair drafts stopped and my heating bill was reduced by more than 10%.
In FPS video games, where the game does not allow one person to pass through another person or any form of shoving, someone shoots from the door, preventing all behind him from either running past him or helping him kill enemies.
Stop doorblocking you noob, we're trying to rush here.