While I was standing at the cash register at the supermarket, in front of me there was a Japanese family buying the weekly groceries. In front of them there was a man buying everything, because obviously tomorrow is the apocalypse.
At one point the kid puts his arm on the conveyor belt trying to separate his and theirs groceries. The mother apologizes to the man in front of her.
The man smiles and says - its okay, you know, the Chinese wall!
The mother smiles back politely, but the father's look was priceless...