You are meeting your dad for breakfast at his house on a sunday morning and arrive about 5 minutes early. after knocking on the door several times, you become concerned when no one answers. you unlock the door, stick your head inside and yell for your father. no answer. stepping back outside, you see that the garage door is closed and that your dad's antique car is not in the driveway. maybe he is working on the car in the garage, you think. you open the garage door. your dad is lying on the floor. you run over to him and shake him, but he does not move.

1. what dangers could exist in the garage?