It was a noodle slurp seen around the world: former US President Barack Obama eating Hanoi's staple dish 'bun cha' on a plastic stool with chef Anthony Bourdain; now the restaurant where the pair famously kicked back over pork noodles has preserved their dining table -- chopsticks and all -- under a glass box for eternity, in a move that bemused locals have ridiculed as over the top.