The fire he is talking about is one of the nightclub in Brazil over the weekend. And that last thing he said about rushing out is really important, because experts say that when a crisis happens every second counts. When you're in a crowded place, like a club or a theatre, there are somethings you can do to be ready for an emergency.

Thanks, Carl, we talked to some fire protection and life safety experts this week after the fire in Brazil. And what they told us is there are two things that are very important when you're going to a venue, whether it's a public event, that's preparation and don't hesitate if there is an emergency. But another thing they told us is before you even go, make a plan with your friends, where you're going to meet in case something happens, it might be the car, it might be a public transit stop, it might have to be some place else because in case parking lot is too busy, or you can't get to your car because it's blocked. So what you do is like say you're going to a movie theater  or you go to a nightclub, identify who the workers there are. They might be wearing a particular color shirt, you might ask them where the extra exists are or if they unavailable to do that, then go take a lap around, or if you're sitting in a movie theater, look around to see if where the extra exists are. Because if an emergency happens, most people are going to head out the way they came in, that's what's familiar to them. And people tend to stick with that, if you familiarize yourself with the alternate exists, then that's the way you're going to go if you can in case there is an emergency. Now if you hear fire alarm, don't hesitate, head for the exists. One expert told me it's those ten seconds that can cost you your life. So head for the door if you can't see because the smoke is coming down or it's too thick, and feel your way forward, go in a straight line until you hit a wall, when you hit the wall, then you're going to take your hand, and you're going to follow it around until you get to maybe a door or you get to a window.

Brazil is going through three days of mourning for the hundreds of people killed in that nightclub. Police have arrested several people in connection with the fire, those people are being held temporarily five days to start with, authorities say they need to do that in order to get more information for their investigation.