Why did jaws drop throughout Andrew’s Gray’s Inn greasy spoon when London chef John Cadieux of Goodman steakhouses and butcher Darragh O’Shea of O’Shea’s of Knightsbridge revealed their BurgerMonday pop-up burger? Were diners expressing astonishment at the unreasonable height and drippiness of this bacon cheeseburger? Or was it more the reflexive action of carnivores stretching and shaping their mouths for the imminent entrance of that brioche bun and all the beef, special sauce and accoutrements John stacked beneath his homemade, egg-polished, sesame-seeded dome?

You decide. Analyse the pics in the event slideshow below by photographer Paul Winch-Furness. When you feel the lower portion of your mouth falling the first thing you must do is pick your jaw off the floor. Then ask yourself if this involuntary movement was triggered by intense feelings of astonishment or practicality.

[oqeygallery id=12]

slideshow photos by Paul Winch-Furness