SEATTLE -- Two people were taken to the hospital after a two-car collision caused one of the cars to fly off an overpass, according to police and fire officials.

Oofficials said a pickup truck headed north on Highway 99 crashed into an SUV on the Mercer Street off-ramp around 6 p.m.

After the cars crashed, the pickup jumped a 3-foot guard rail, flew off the ramp and landed upside down on Broad Street some 30 feet below.

Amazingly, the driver of the pickup walked out on his own, officials said.

"He actually got out of the vehicle and walked a bit until somebody contacted him and told him he should probably sit down," said Phil Vanhollebeke, the SUV driver's son.

Vanhollebeke, who had been following his father in another car, said he was shocked to pull up to the crash scene.

"I saw my dad looking right at me, watching me drive by, so I pulled off," he said. "He was sitting in his front seat with his seat belt on, pretty white."

Firefighters freed the driver of the SUV from his car. The two drivers were taken to Harborview Medical Center with non-life threatening injuries.

"I think he's just got scrapes and bruises," Vanhollebeke said of his father.

Detectives believe excessive speed may have launched the pickup off of the ramp. They said the situation could have been much worse.

"There are a lot of vehicles down there (on Broad) so it was just probably luck that he didn't actually fall on top of another vehicle," an officer at the scene said. "Actually I came right through broad street about three minutes before this happened."