VIDEO: Robbie Keane floored..is this the angriest goal celebration of all-time?

Republic of Ireland goal hero Robbie Keane might have had reason to assume his teammate would be happy when he set up a tap-in for him.

LA Galaxy were trailing Montreal Impact 2-1 when Keane evaded the opposition's attention with a clever run out wide where he received the ball and brilliantly crossed for Alan Gordon who had little to do but knock it past the 'keeper.

Most strikers would be grateful to their team-mates but, bizarrely, Gordon ran straight at Ireland's record goal scorer and knocked him to the ground before running off to celebrate with his other teammates.

Poor Robbie was left to pick himself up off the floor. What would Gordon have done if Keane has mis-kicked his cross?

The game finished in a 2-2 draw.