Help experienced riders! Is this safe?
 

I'm looking for a bike on pink-bike and I found a beauty- but there's a dent in the frame. It's a 2009 norco 250 full chromo steel. Is this something to be worried about? Should I bail or will I be good. I need a tank of a bike, I wanna do street riding and put it through hell. http://www.pinkbike.com/photo/8637246/

I would run as fast as my feet will move and get far away from that bike!

The 2nd pic almost looks like it's buckled, unless that's a weird reflection.

Dents are weird as I've dented a few frames and they were fine, others end up cracking later at the joints. If it was already your bike I'd suggest keeping a sharp eye on it for cracks, especially by the closest weld to the dent.

When a frame cracks on you, you'll know it. Suddenly the whole bike feels loose and even flexible. Road bike riders are more scared of cracked frames then anyone one else, as I think they put more stress on a frame racing then BMX jumping, because the frame is constantly flexing. Where a Bmx absorbs a quick shock and that's it. And no one want's to be stranded out in the middle of no where.

Personally though, if you're planning on some big time jumping this bikes probably not for you. I would only be interested in this as a "Parts" bike and only if it was so cheap the owner was giving it away.
Now you know what you want, I'd spend a little more time and a little bit more money looking for the same bike in good condition. In the end it will save you money, time, and frustration from trying to fix broken.