Chokehold

While you have an opponent up to one size category larger than you grappled, you can attempt a grapple combat maneuver with a –5 penalty on the check. If you succeed, you have pinned your opponent and hold the opponent in a chokehold. When you maintain the grapple, you also maintain the chokehold. A creature in a chokehold cannot breathe or speak, and thus cannot cast spells that have a verbal component. An opponent you have in a chokehold has to hold his breath or begin suffocating. An