Passengers huddled together and pushed open emergency exit doors, Stone said. Some didn't bother to use evacuation slides; they jumped directly out onto the tarmac to save themselves.
Ben Levy helped people out even though he had broken ribs. He tweeted a photo of fellow passengers sitting atop their bags. Behind them, the Asiana jet sat consumed in smoke.
At the airport, witnesses said they could see people running out.
"I was happy to see that some people were running out," said one man. "Then I went, 'Oh my god, some people lived.'
Then emergency responders and firefighters were all over the tarmac.
"They're evacuating the injured," Eun tweeted again. "Haven't felt this way since 9/11."
He was one of the lucky ones aboard Saturday. There were 291 passengers and 16 crew members on Flight 214.
"Friends, pls don't call right now. I'm fine," he tweeted.
"Most people are totally calm and trying to let the fire and rescue do their jobs," he said. "Just like during 9/11, most people are great and try to be helpful in crisis..."
The charred carcass of the jet was still on the runway. Many of Eun's fellow passengers were in Bay Area hospitals.
When he finally left customs, Eun began to think about it all -- and about all the people he cherished.