Is it in his contract that he has to roar every time he scores or is there some other event in his personal life he's emotionally exploiting this week?
"Personal life In 2015, Knockaert was given a personal leave by the club after his father, Patrick, became ill. The following year, when his father died on 3 November 2016, he sat out of the match against Bristol City. It was not the first time he suffered a tragedy: he lost his elder brother, Steve, in 2011 and after scoring in a 3–0 win against Nottingham Forest, Knockaert dedicated his goal to his late brother."
No. I just don't understand why someone has to burst into tears and collapse in a heap every time they score.