Mason Zisette, a 16-year-old Manhattan Beach boy, died Saturday, July 12, 2014, days after he struck a freeway overpass when he stood up on an open roof double-decker bus traveling 45 mph, police said. 
 
 A 16-year-old Manhattan Beach boy died Saturday days after he struck a freeway overpass when he stood up on an open roof double-decker bus traveling 45 mph, according to the LA County Coroner's Office. 
 
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 The double-decker bus with Starline Tours chartered for a private party was traveling south before 8 p.m. Thursday on the San Diego (405) Freeway near the Arbor Vitae Street overpass when the incident happened, said CHP Officer Edgar Figueroa. 
 
 The teen was identified as Mason Zisette, according to the coroner's office. 
 
 Investigation Continues After Teen Hurt on Double-Decker Bus 
 
 A CHP investigation continued as a 16-year-old Manhattan Beach teen remained hospitalized after being critically injured while riding a Starline tour bus. The teen's friends are planning a prayer vigil after the boy was hurt when he stood up on a double-decker bus and struck a freeway overpass. Jane Yamamoto reports NBC4 News at 5 p.m. Saturday, July 12, 2014. (Published Saturday, July 12, 2014) 
 
 The private bus had 45 passengers, most of whom were under 18 years old and were with adult chaperons. 
 
 A witness told NBC4 that the teen may have been dancing on a seat cushion with his back to the freeway signs when his head and hands slammed into the sign. He then collapsed on the floor, the witness said. 
 
 About two dozen teens were present and dancing on the upper deck at the time of the incident. All adult chaperones were inside the bus at the time. 
 
 The California Highway Patrol was investigating the incident. Starline declined to comment. 

 A 16-year-old boy died Saturday, two days after he struck a freeway bridge while standing on the top section of a double-decker tour bus, authorities said. 
 
 The boy was standing on the "open roof" section of the bus as the vehicle drove under the Arbor Vitae Street bridge on the 405 freeway in Inglewood, the California Highway Patrol said in a news release. 
 
 He was transported to UCLA Harbor General Hospital after the accident, which occurred about 7:45 p.m. Thursday. 
 
 He died Saturday at 5:23 p.m., according to the Los Angeles County coroner’s office. Officials are still determining his cause of death. 
 
 The coroner's office identified the boy as Mason Zisette of Manhattan Beach. 
 
 The bus, operated by Star Line Tours, had about 45 passengers, according to the CHP report. Most of the passengers were under 18 years old, and a few were adult chaperones. 
 
 Follow @RosannaXia for more California news.
– Kids, don't screw around on double-decker buses. A California teen died yesterday, two days after hitting a highway overpass while standing on the top floor of an open-air double-decker bus, the LA Times reports. The boy, identified as 16-year-old Mason Zisette, was one of about 45 passengers on a Star Line Tours bus chartered for a private party. Most of the passengers were under 18, with just a few adult chaperones. Mason may have been dancing on a seat with his back to the overpass, says a witness, who tells NBC 4 Mason's head may have slammed into one of the freeway signs hanging from the overpass, rather than the overpass itself. The bus was traveling at about 45mph at the time. It's not the first time something like this has happened.