Eighteen-year-old Sean McAlpine, above, looks like your average South Torrance High student as he hops onto his motorcycle after school.
"I built the motorcycle," McAlpine said. "I've ridden since I was a kid. I used to race them but broke too many bones."
Now he has channeled his interests toward martial arts.
These days, after the 2 p.m. bell, the senior speeds off on his motorcycle to the San Pedro martial arts school where he teaches with his master, Kazja Patschull, who introduced him to the sport four years ago. He's been hooked ever since.
"For the last four years I've been working out for six to seven hours every day except Sunday," said McAlpine, a first-degree black belt.