It's hard to tell exactly what happened here, but it seems as though the driver of the white car is trying to perhaps beat the Subaru to merge from one roadway onto another. The white car seemingly runs out of room and the Subaru merges properly, though perhaps at too high a rate of speed.
With no room left the merge, the driver of the white car attempts to avoid the collision but in doing so its wheel lift off the ground and control of the car is lost. It then slams directly into the driver's side rear area of the stopped blue Tesla Model X. At this point, the Tesla goes a bit airborne, while the white car proceeds to roll over before coming to a stop.
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