It is on the rear left, on the driver's side of the car.
Below is a picture of the rear right, on the side - showing the seam between the bumper and the rest of the car body (it's a wrap-around sort of bumper); other than the fact that the car has not been washed (and I didn't try to clean it up for the picture), it looks fine.
|The "good" side|
Below is the left rear, side, where the impact caused the bumper to push out, a bit, after I tried to push it back, again:
|Left rear, side|
There is still a bit of a gap:
|Close up of area closer to the tire|
The gap is more noticeable towards the rear:
|Close up of gap towards the rear|