Seconds before the crash, witnesses quoted the driver as yelling "YEEEEEEE-----HAAAAAAAAA!!!!!!!!!"
Looks like a fairly hilly region (looking at google street view of the city/area). That, plus driveway slope/curb, plus excessive speed = "oh hey, apparently I CAN fly."
Wouldn't have happened if he'd been driving an M3.
Lol. Took out 2 cars plus a house - BONUS POINTS!