This has been a pervasive issue in my Hunger Games server. When the selected map is "Cancer Valley," and players approach the Cornucopia (central area) of the map, there is a chance that they will be sprung into the air by a mysterious force. It does not happen every time, but it tends to happen when the server has been running for a while, and once the issue starts, it does not stop until I rehost the server. This occurs in no other location, just in that one map. I'm not sure if it's caused by add-ons, so I will not present a list; however, I will note that I require both Zone Events and Slayer at the bare minimum, and that I have checked each zone in that map to see if events are causing the problem. If this is not a typical issue, I will share both a list of the add-ons I normally enable and the .bls of the map, or host a server so someone can investigate the problem.