"Look into the camera," and bring your eyes nowhere else, not behind to where the lady stands, holding an eight-year-old's hand.
"Place your forefinger on the sensor," and don't dare move it closer to your wet eyes, for the man with the ten-year-old might see you shudder.
The arrow always points forward, so take your steps fast and sure. Ignore the shouts, shove away the feels, smile and wave your way to DEPARTURE.
There is a window-wall that separates the passport checkpoint area (and the terminals) from the rest of the airport in Bangkok. Loved ones often lounge by this see-through wall, clinging onto their last chance to say goodbye.