i believe it's also sop on ua unless they have the pull-out gates that i've seen on some 57's and for me, when i osberve the cockpit door being opened in mid-flight, i stop what i'm doing, watch and wait until the capt/fo has returtned-and KUDOS to the f/a who noticed me watching and when the "pp-break" was over asked to speak to me in the aft galley. i was asked if was a leo and asked why. the f/a's response was that she noticed me "watching" and i simply told her-"not on my flight" (a bottle of wine was waiting very unexpectedly when i was de-planing with the purser's and capt's business card saying thanks). this would not be the first time i've been questioned but the other was a bit more obvious-take off roll las-sfo on a 37 w/me in 6c (first row of coach for you non-ua'ers ) and the door to the flight deck swings open as it wasn't locked properly. the f/a in in the f/s jumpseat gets up to try and close the door but can't so i get a great view of the flightdeck and crew not batting an eyelash as it was rotate, gear up and a very fast level at 3k feet to get the door closed but what the f/a didn't notice until after getting the door closed was that i had un-buckled and swung my legs across the aisle as did the person across from me in 6d. we were both asked to wait for the captain after landing and figured, "oh, $hit..."but it was a hearty thanks and travel vouchers for us.