Thierry Henry’s hat-trick stunned Norwich City and helped Arsenal to go second in the Premier League table.
The Frenchman scored his first after collecting a Robert Pires pass on the edge of the area and then fired in a second from the left three minutes later.
Darren Huckerby pulled one back for Norwich but Fredrik Ljungberg headed in Lauren's cross before Henry poked in a Jose Antonio Reyes pass to complete his treble.
Arsenal moved to 67 points, above Manchester United on goal difference but 13 points behind leaders Chelsea. Norwich remained bottom.
Chris Brunt’s two penalties gave West Bromwich Albion their first victory over Liverpool in more than 30 years.
It was a memorable win for Roy Hodgson, whose unbeaten run as West Brom manager was extended to five matches, against the club who parted company with him just three months prior.
Martin Skrtel had put Liverpool ahead with a header on 50 minutes but Brunt converted two spot-kicks won by Peter Odemwingie.
The result lifted the Baggies to 13th place in their fight against relegation. Sixth-placed Liverpool dropped 10 points off the top four.