I was on UA 256 last night (DEN-ORD). We boarded and taxiied out to the runway (or near it). After sitting there for about 45 minutes, the captain came on and said we needed to go back to the gate for a form. Evidently we were carrying some cargo that required us to have this form on board. I don't understand a) why the captain didn't figure out she needed the form before we left the gate and b) why they couldn't just fax it to her or something. There is some sort of document transmission system in the cockpit I think, because on my ORD-DEN flight that morning the captain said he was waiting for some maintenance paperwork "and, oh here it comes".

And does anyone know what cargo we were carrying? We didn't have a Lifeguard callsign - just United 256 heavy.

In any case, it was nice being in F and getting dinner - the cold salmon plate wasn't bad.