2014 mini countryman

[mookie1982]

strange thing happened this evening whilst whaching tv...
Mini was parked on the drive since around 1pm, at 9:05pm heard a loud bang and the alarm went off.
Looking over the cctv footage it shows the car drops at the rear..
Cant find anything around the car and cctv shows that there is no one around that could have caused this thing..

[edc]

Snapped coil spring.