BTW, the enclosed video shows the boulders and tree did not swerve prior to the collision.
If you watch carefully, why cats have nine lives. (Second two angles.) Cat-like reflexes indeed.
No people on bikes hurt because no people on bikes. The person in the car was also unhurt.
The tree did not survive. The two large boulders the size of small boulders were repositioned and are expected to make a full recovery.
-mr. bill