What did this?

One day at 12 pm I was home alone and went to get water.I got up and heard a pop. But I tried to move but I couldn't what can cause this is it safe

?2015-08-17T17:40:09Z

I'm 13

Josh P2015-08-16T18:58:26Z

I would talk to your doctor about this. It could be a serious problem or maybe just an isolated incident.

Anonymous2015-08-16T18:59:24Z

Wow... since you did not give any pertinent information, there is no way we can answer that.

joe2015-08-16T19:44:14Z

cause this can what be old is age