I bet Hans Laetz was one of those witnesses.
https://www.sfgate.com/politics/article/san-francisco-brown-calm-in-helicopter-emergency-2692933.php
Brown was traveling from a Santa Barbara fund-raiser to Los Angeles International Airport when the helicopter he was riding in experienced transmission problems shortly after 9 p.m. Aided by the lights from a football game at Malibu High School, the pilot brought the helicopter in low just south of the football stadium before making a hurried landing at Juan Cabrillo Elementary School.
"They came in from the west below the height of the light standards," said Hans Laetz, news operations manager for KABC Channel 7 Los Angeles, who was attending the game Friday night. "They barely cleared the high school and then landed very quickly at the elementary school playground. This guy came in fast and he was down in 10 seconds. You could tell it was not a planned landing."