Supersize my toast

I've seen a lot of stuff recently that I don't understand, but if we needed any evidence that this credit market rally may be getting a bit silly, I think I may have found a compelling shred. A couple of days ago, Blockbuster announced an offering of "up to" $340m in senior secured notes, but LCDNews has just reported that this offering has been up-sized to an unfathomable $675m. Most of the deals I've come across recently have been up-sized, but not doubled. The coupon may be huge, I don't know yet, but what else could make this so compelling that demand could lead to a supersizing like this, especially with incineration such a strong possibility?