Does this video show a ghost using an exercise machine in a park in Cancun, Mexico?

Make of this what you will.

A mother visiting a park with her children in Cancun, Mexico, shot this video when they witnessed an exercise machine moving all by itself, as if a ghost or an invisible person was doing a spot of exercising.

The mother and her children were enjoying a quiet day out in the park when suddenly the machine started to move vigorously all by itself which scared the kids. She immediately called the kids back to her to keep them safe.

She then pulled out her phone and started filming the machine. You can hear her say “Look at that, how is it moving alone” (a rough translation)

Is this real, a prank or video trickery?  What do you think?