"250 firefighters are on the scene, and initial reports suggest the collapse was owing to a gas explosion. The situation has escalated to a seven-alarm fire with flames spreading to up to three other buildings." - Andrew C (✔)

I had no idea there was such a thing as a "seven-alarm fire". Scary. - Andrew C (✔)

The pictures on Twitter looks scary. I hope no one is hurt. (Well, never mind. My Twitter TL updated as soon as posted and I see that there are several injured.) - Anika

So scary! I'm so disappointed in the people in the video that are too busy taking photos and video to actually HELP. sheesh! - Shannon - GlassMistress

But what could bystanders do that would actually be helpful, besides staying out of the way? - Andrew C (✔)