The door cannot be played with at cruise -- it will simply not budge. The pressurization of the aircraft keeps the door firmly "plugged" into the wall. Even the door opening lever cannot be moved at higher altitudes.

Regarding water: I does not appear AI refused to serve water. They said they would serve it after the complete the juice service. Have seen it happen quite commonly on many airlines... "can I have coffee please?" "I'm sorry sir, we do not have coffee on the cart, we will bring it for you after we finish the drinks service". Had this happen on BA, AA, LH, etc etc. I see no problem with it.

But if you are they type that wants it, and wants it NOW!, then I guess you will be disappointed (or will continue to fly airlines where you can just order the crew around).