The Range Rover smashed through a concrete barrier and ended up upside-down on the road below.
Surveillance cameras from the condominium captured the SUV plunging into the ground.
"I could see the poor gentleman moving, so I'm telling 9-11, 'there's someone here and get someone here soon.' I tried telling the guy not to move," said one witness.
It was a bad accident; however, emergency responders said the man was alert. He was transported to Los Angeles County USC Medical Center with some head trauma and possible back injuries. But by all accounts, he was in relatively good spirits after the accident.
Authorities said the victim may have accidently hit the accelerator instead of the brakes when he was parking in his appointed spot on the second floor.
Security personnel at Park Towers said the elderly man routinely returns home at 9 a.m. every day from morning classes.
"It appeared to me that he was driving with his shoes off, which may have contributed to the accident if his foot slipped," said Michael Garrett of the a Park Towers security department.
"I do understand that the man is physically fit. He goes three times a week to work out. I understand he does karate, so maybe that's why he's not wearing his shoes today," said Sgt. Tom Lorenz of the Glendale Police Department. "It's still very early in the investigation, so we hope to figure everything out."
The totaled Range Rover was still blocking traffic on the street Friday morning. Investigators said the street will be closed for a couple of hours while they clean up the scene.
Security personnel at the structure said that similar crashes have happened before. A couple of years ago, one of the residents drove through a steel gate and another one drove through a wall.