"It actually came down in front of us".
"Never in my life did I think I would see a plane fall out of the sky". It lost control and it just fell straight down.
"There was no fire, no flames, no smoke, nothing".
The FAA and the National Transportation Safety Board will investigate the cause of the crash.
The twin-engine Cessna plane was bound for John Wayne Airport when it crashed a mile (1.6km) away on Sunday. "It wasn't much devastation [on the ground] other than the actual plane crash". "#SantaAna", tweeted user @xomissella with a photo of the crumpled plane amidst some palm trees.