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.
This was a painful dose of deja-vu for West Ham, who also fell 4-0 down before half-time in last season's home game against Arsenal. That match ended 6-0.
A video taken from inside the London Stadium on Saturday captured the moment home fans staged a mass walkout shortly after Kai Havertz had found the net to score goal No 4.