A Sydney man says he was "shocked and confused" after a car smashed into his house and caught fire before the driver allegedly tried to flee.
The vehicle slammed through the bottom level of the Carnavon Crescent property in Georges Hall early on Monday morning.
Both the vehicle and part of the house caught fire and three residents escaped while firefighters doused the flames.
The owner of the home, Chris, recalled being surrounded by broken glass and hearing things begin to collapse.
"We are inside we get shocked, we don't know what to do, I get confused," Chris told the Nine Network on Monday.
"I hear my neighbour saying 'get out from the house', we help my wife and son, outside I saw the car in the house and start catching fire."
The driver, a 21-year-old man, allegedly tried to flee but was held by neighbours until police arrived.
A resident of the street described the sound of the crash as being "like a rocket" before the driver was detained.
"I saw him run away, we grabbed him," the man told reporters at the scene.
"He was saying 'I'm dreaming, am I dreaming?' - maybe he's on something, I don't know."
The man was taken to hospital for mandatory testing.