Okay - the engines were going when the pilot made his speech and I could hear nothing - I figured he was saying to have a good flight. He did come by the exit row earlier and said we'd be in charge of the door which meant tossing it. The flight was quite bumpy and the doors were closed to the cockpit as soon as we took off. As we landed the curtains replaced the doors. So i would have had to open the cockpit door to get to the curtain. I think there should be some sort of a call button or intercom for obvious reasons. You shouldn't have to get out of your seat if there is a concern.
I guess you weren't on a refurbished BEH with wireless broadband internet and lie flat seats. Those models have a call button. You should look for those next time you book a flight on the BEH