Saturday night's Premier League game between West Ham United and Arsenal delivered seven goals in the first half.
But thousands of Hammers fans missed three of them after heading for the exit en masse after seeing Arsenal go 4-0 up in the 36th minute.
A video taken from inside the London Stadium capture the moment fans staged a mass walkout shortly after Kai Havertz had found the net.
Havertz's goal followed strikes by Gabriel, Leandro Trossard and Martin Odegaard.
The Hammers fans who stayed were briefly given a glimmer of hope as full backs Aaron Wan-Bissaka and Emerson pulled goals back for the home side.