It happened along the 1200 block of 6th Avenue, just after 1:30 Sunday morning.
Altoona Police say the driver, 29 year-old Heather Mozley and her passenger, 22 year-old Zachary Reed, both from Altoona, died at the scene.
Police say Mozley was driving a silver Mazda Tribute too fast, lost control and crashed into a parked car, then into two houses before flipping and landing on its roof at the intersection of 12th Street.
Neighbors call what they saw, a terrifying scene.
"I wish I never saw it," Haylee Plummer said.
Haylee watched it all happen outside her bedroom window Sunday morning.
"I saw the car come up this way, take out poles that were here and then I watched it come up the street, take out the telephone pole and then I watched it flip, embed into our shed," she said.
A scene she calls terrifying.
"I was petrified and scared. I didn't know what to do," Haylee said.
Police say 29 year-old Heather Mozley was driving the car, when she lost control, crashing into a parked car and pushing it more than 20 feet down the road. They say the car then sideswiped a house, causing it to rotate and become airborne before landing on its roof and sliding into the Plummer family's shed.
"I just heard 'bang, bang, bang, bang', Steve Horton, said. "I opened up the door and came running out."
Horton was closing shop when he heard it happen, the first time he's seen something like this in 20 years.
"I've never seen anything like it," he said. "It was horrific. I actually froze and was shaking. I've never seen anything like that at all. It was bad."
Haylee says other crashes have happened here before. Never like this one, but enough for her family to make some changes.
"Our front porch was actually facing 6th Avenue, but because of tragic accidents before, we had to move it back, just to protect," she said.
She says everyone on the block is still shaken up.
"I just kind of want to put it in the back of my head and move past it," Haylee said. "My prayers are with the family."
Police are continuing their investigation, but believe high speed and alcohol were factors in the crash.
Copyright 2015 Nexstar Broadcasting, Inc. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.