I've encountered many times in lifts when i keep the door open or when the door is closing and i see someone attempting to get in, i press the door open button. These bastards will just walk in like a King without a word of thanks or even acknowledgement. Damn tulan. I normally look at them and say loudly "your're welcome". Everyone else in the life will be staring at them. In the end they lan lan look downwards throughout the lift ride.