Why did Sarah need an injection of insulin if her blood sugar was so low? Doesn't insulin reduce sugar levels even more?
Yes, insulin will reduce the amount of sugar in a person's blood. Many viewers, knowing that Sarah was a Type 1 diabetic and was suffering from hypoglycemia (low blood sugar), incorrectly conclude that she was injected with insulin. What she needed, and most likely received, was glucagon. Glucagon is essentially the opposite of insulin. Insulin causes your body to take the sugar into the cells and causes blood glucose to go down. Glucagon causes your liver to release its stored glucose into the blood, causing the levels to rise. The reason they give glucagon rather than drinking something like orange juice is because, when sugars are that low, there is a strong choking hazard, so it's not smart to give anything by mouth.
What would have happened to Burnham?
He obviously would have been arrested and charged with breaking and entering and likely with grand larceny among other things. It's possible his sentence may have been reduced or certain charges dropped if Meg and Sarah testified on his behalf.
A panic room, also known as a safe room, is a secure room with it's own telephone line where residents can hide to protect themselves from a break-in, home invasion, or other threat. In Panic Room, the safe room was so well-fortified as to contain security cameras, PA system, concrete and steel walls and floor, a four-inch-thick steel door, and its own ventilation system.