Dove (the celebration, not collapse) on his debut after scoring. Immediately won over every English fan who had called him a diver. Genius self-awareness.
Hat-trick on his debut against Liverpool. The "White Feather" pulled his shirt over his head for the first time in England. Boro got relegated. He still scored 17 goals.
Scored 4 goals on the opening day of the Premier League. Against Arsenal. A goal every 21 minutes. The first Premier League hat-trick (plus one).
16 years old. 5 days before his 17th birthday. Scored a 30-yard winner against Arsenal to end their 30-game unbeaten run. "Remember the name — Wayne Rooney!"
Scored on his debut against Middlesbrough. The beginning of one of the most elegant careers in PL history. Wenger hadn't even arrived yet.