If your bottom decides to eat their way out of their gag, there is a risk of them choking on a piece of food. This risk may be increased if they are breathing heavily or laughing at the same time they are attempting to chew. Monitor your bottom’s ability to breathe continuously and try not to chase them too fast around the pasture. If your bottom does begin to choke on an aspirated piece of food, quickly remove anything obstructing their mouth and deliver five back blows with the heel of your hand. If there is no improvement, deliver five abdominal thrusts (a.k.a the Heimlich maneuver).
More information about First Aid for choking can be found here: American Red Cross Choking First Aid
Regardless of which type of BDSM play you choose to engage in, it is a good idea to update your First Aid knowledge from time to time. You never know when it may come in handy.