I am going to guess thats $5k worth of damage.

Get that car up on a lift, no car's rear end just comes around at 15mph. You are in CA so their wasn't any ice.

Something broke or something happened.

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1969 280SE
2027 Ram 1500
2026 Genesis GV70
2007 Tiara 3200
1988 Egg Harbor 37
1981 Boston Whaler 17