The negative below was shot in one of my Holga's and has ghosts of sprocket holes on it toward the bottom.

Is this something that happened in the lab where I had the film processed?

If so, how would it occur?
The film was fresh 120 Ilford HP-5.
I bumped the contrast to exaggerate the effect and didn't bother with dusting the scan. :
Thanks for all input.

[Sorry, image deleted during forum software upgrade. Please re-upload if so inclined.]