Poltergeist caught on film at hospital in Argentina?

Spooky footage has emerged of a hospital bed being violently thrown around outside a hospital in Argentina by a poltergeist.

The incident was caught on cctv outside a provincial hospital in Rosario, Santa Fe. 

The stretcher starts drifting around the pavement, eventually getting more violent and ends up toppling over. 

It seems we can rule out wind being the factor behind the stretchers movement by the motionless plants.

When the video was posted to social media people claimed the video was part of a practical joke and there was no poltergeist involved. People countered these claims by insisting the cctv camera is that clear, we would see ropes or strings used to move the stretcher.