open on different floors. otherwise you would not get that volume of smoke on the upper floors. those people probably panicked. a lot of them might've been better off if they stayed in their apartment. but you don't know unless you're in that situation. and you're absolutely right. closing doors in those buildings, it's something we talk about all the time. we try to spread that word. but when people are afraid and they panic, they don't think of it. >> and what do you think the next steps are going to be at this point to determine the cause of this fire? when you just look at the situation in the video, do you have any sense as to what may have caused something like this? >> you know, the cause of the fire at this point who knows, cooking, it had to be something in that individual apartment. and it would be contained to that apartment as some of the tenants already said if it hadn't been allowed out of the apartment. those doors are fireproof, the stairwells are fireproof.