Usually the escaping gas will ignite throwing flame away from the stove. Keep the cap pointed away from you and outside the tent door. Fill the tank before starting to cook. If you have to fill the tank while cooking, allow it to cool off before fueling. A funnel is a considerable help in filling.
Gas can assume the air temperature and can cause frostbite if spilled hands during subzero days.
After filling, replace the cap on the fuel bottle and place it far away from where you are operating the stove. Because stoves produce carbon monoxide gas, always make sure your tent, snow cave, or igloo is well ventilated. In the winter when water surrounds you, it's surprising to be worried about it. Yet, making sure you have enough of it is a constant concern. If you're in an area where open streams or lakes exist, you'll have a ready supply.