If you would like to load and unload the fire safety, you should put the safety on first. Just to be sure, place the nuzzle towards a safe direction which means that there is no one there that will get hurt if in case an accident occurs while you are loading and unloading the fire safety. It is best that this process is done when doing this as some people usually encounter some issues because of this.
You do not want to end up unintentionally hurting someone just because you did not follow the proper precautions, right? There are times when this procedure is more complicated because of the weight of items that need to be unloaded. Things should be done slowly and steadily to be sure.