5 mins long contractions.....

Now before some may get nasty, this is my second child and every pregnancy and person experiences things differently each time. I had a 5min long contraction at 10 a.m. I looked up if anyone.Has experienced this.before and actually went on to go into labor. There were a couple of girls that had this experience. Now my question is has any of you had this.happen? I'm aware that "true" labor contractions can be 1min every 2-5 mins for an hr. But things can be different.