Well, at first I thought the unit was unstable due to winds blowing over the house. However, it suddenly flipped and fell to the ground. The left front motor would not spool up. Thinking the battery was getting low, I charged it and checked all fitting . Inside the house, the same motor would not spool up. Last night I switched it with its direction mate, and confirmed the motor is dead. So, I guess I need to run to the hobby shop (darn) and pick up a motor. Probably when there I will grab a spare of the other side in case 1 fails. Is this normal for a motor to die? Being my first drone, I don't know how long things usually last.