Partygoers at South Beach's Mokai Lounge recently saw a go-go dancer dressed black lingerie, attempting to ride a white horse through the crowd.
The horse was spooked and the woman fell down as a man struggled to control the panicked animal.
Footage of the scene leaked and when animal lovers saw the video, they were outraged.
"Disgusting. No words to describe what I feel when I watch this," Sofia Jaramillo wrote on Instagram. "I hope they get what they deserve."
Animal activists were sharing a video of the incident, shaming the nightclub on social media and asking authorities to punish the event organizers.
"We are very concerned over the allegations," Miami Beach police officials responded, in an interview with Local 10. "As such, we have launched a joint investigation with Miami Beach code enforcement."
Authorities continue to investigate.