Usually, the fire dept. in our area will turn off the power to the elevator which removes power from the doors and asks the occupants to push the doors open from the inside as long as the cab is close to the floor. If the cab is in between floors you should get on the phone with the elevator company and find out the Mechanics ETA. It really sucks for the building when the fire department destroys the doors and the elevator mechanic shows up 5 minutes later. However, it is good for the elevator companies in billable repairs.