Content Warning: The following video is NSFW.

This is why safety is so important at the gym. If you work out without using a spotter, accidents can and do happen. In this case, the accident was fatal. After dropping heavy weights on his chest, the unidentified man collapsed on the floor of the gym due to to chest trauma. Take a look at the video below:

This video may be disturbing, but it’s an important lesson for all of us. Safety comes first when you’re in the gym. Period. The injury isn’t brutal, bloody, or unusual — all that had to happen for this man’s life to end was a split second mistake. He dropped the weights and that was it.

Roughly half a million people a year are injured in gyms, and most of those injuries are avoidable if you take the proper precautions. In case you’re new to the gym or not sure how to use complicated equipment correctly (we’re not judging), here are some important general safety tips for gym-goers: