his usual＋adj+self #2
「pronoun+usual+形容詞（名詞）+self」は定番の表現です。「いつもながらの〜らしい...」という意味を表します。ここのfirecrackerには 「刺激的な人物、魅力的な人物、はじけたキャラ、目を引く」などの意味があります。（UG）
World Cup: Mexico coach Herrera's wild touchline antics a hit on social media
(CNN) -- The action on the pitch at the World Cup has been sensational -- but one man is engineering plenty of eye-catching scenes off it too.
The wild touchline antics of Mexico coach Miguel Herrera have fans the world over willing his team to score, just so they can revel in his reaction.
During Monday's 3-1 win over Croatia, which secured Mexico's place in the last 16, Herrera was his usual firecracker self on the sidelines.
Now social media is awash with clips of Herrera hugging his players, screaming at the officials or rolling around the floor celebrating a goal.
"Miguel Herrera reactions are the best reactions ever," said one on Twitter. "Miguel Herrera on the sidelines should be a Broadway show. I'd watch for years straight," said another.
