person A: As I was sleeping_comma_ my burglary alarm went off. It frightened me. 
person B: I would have been scared_comma_ too! Was it by fault or was someone attempting to break in?
person A: I'm not sure_comma_ the motion censor is what was triggered so it could have potentially been a number of things. 
person B: Mine did that_comma_ too. We had to replace the motion sensor.