The "Seal Charge" is a tactic used by many players in the game, which has caused much controversy, and is seen as a dirty tactic.
The seal charge is an attack maneuver commonly used in melee. To seal charge, one rapidly goes prone and stands up whilst attempting to bayonet an opponent. This tactic has proved effective in part on the battlefield, confusing opponents, and making it difficult for them to hit back.
It has been discussed whether or not sealcharging should be allowed in realism-battles, as it's seen as a "cheap tactic" and also as an exploit by many, including server-admins and developers. In version 2.0, this exploit/bug is not a feature due to new coding so that it will no longer play a part in the game.