This seems like an easy one to answer, and you already know what to do! IF you had an emergency that required immediate medical attention, there is NO WAY possible, you alone could take care of that child, dress properly and strap into a care seat, and dress and strap all other children in care, commute to the hospital, safely secure the other children while getting the little one in distress to the ER, or unstrap all, unload from car, get hurt child in with all others and care for everyone properly. Your ONLY option in an emergency situation is to follow a written plan of: call 911, secure the child (administer cpr, first aid, etc.) call next of kin for child, call emergency care giver for help, make sure all other children are safe and accounted for. That in itself can be daunting. I couldn't imagine attempting to transport that child and all others to the ER. Not to mention, couldn't there be more liability involved if you chose to take into your own hands? what if the parents sued you for taking too long to get to hospitol or what if you get into an accident on your way? too many what ifs....stay home call 911, care for the child until the ambulance, notify parents and keep all other kids calm and cared for. That's your job!