When you SHIFT-Right Click with an empty hand on a chest it will be placed on your head. It will be placed in your helmet slot, so make sure that you don’t have any helmet equipped. If you press SHIFT and mouse over the chest you can see his content.
As we know bringing chests on the head isn’t the easiest thing in the world, they are heavy and such, so you have to balance it! When you pick up a chest two bars show up:
The indicator on the left moves when you move your head up and down, if you go near the red zone the chest can fall, dropping all the items on the ground.
When the chest is going to fall the bar on the left will start to quickly fill up and when it’s full the chest will fall. The right bar will start to fill up even if you are running.
By default you have 1.5 seconds to balance your chest, but you can easly change in the new in-game config GUI.
You can disable this feature too in the config.
If you want to prevent the chest from falling you can hold SHIFT.
Press SHIFT-Right Click on the ground to place the chest