Pop sound from the tailpipe?

I have a 2011 with a 2.7L, with less 10k., when I first start it in the morning I can hear a soft pop sound from the tailpipe. It doesn't do this very first time in the morning. Is this a common thing or should I be worry? Has anybody had this problem?

 

happens all the time, nothing to worry about just another one of those 4 banger things we live with

 

Ok,thanks. I just don't want it, to get any worse down the road.

 

When I first got my truck, as I started it up to back out of the garage, my wife would say "it sounds like your truck is backfiring"...
Its normal, and I believe it has something to do with emissions... something about trapped gases in the converter or something like that as I remember...

 

We have two identical 2009 2.7's at work. Both do it. One has around 40K on it, the other 60K. No problems with either one of them.