Gotta laugh

To build our concrete staircase in the cour has been a real pain for the builder Tony Bat. Nevertheless they've pulled it off and as they're working away in the drizzle, humming instead of cursing (like yesterday), I walk out to offer him and his crew "you want anything, glass of wine, beer, cup of coffee...?"
He quickly answers: "billet d'avion". (plane ticket, vliegticket)