Cavani is another one for doing that, in fact all united players celebrate each and every goal as though they've just scored a 90th minute worldie to win the CL final, I honestly think they must be contractually obliged to do it for the benefit of the cameras.
Every time one of them scores even the simplest or scrappiest of tap ins they run around like deranged lunatics, screaming and leaping and punching the air or striking a pose like they're some form of supreme being to receive the adulation of the supporters.