Middlesbrough scored six goals in an away league game for the first time since October 1960 after thumping Oxford United on Saturday.
A hat-trick from Emmanuel Latte Lath, two goals from Finn Azaz and another from substitute Tommy Conway saw a rampant Boro climb into the Championship play-off positions.
Boro racked up 16 shots in total, 12 of which were on target.
The win also means Boro have scored 15 goals in their last three league games following their 4-1 win at QPR and 5-1 victory over Luton Town before the international break.