Coolant came out of Cylinder Head when removing Glow Plug

[LTHumvee]

Obviously this is a problem and my first thought is that I need head gaskets and possibly head work done but I a not a mechanic by no means. Has anyone else had water drip out or pour out of your cylinder head when removing a glow plug?

 

[NDT]

More info needed. Is it water or antifreeze? Have you been driving your truck around and then this happened? Did you just win this at auction and the air horn was removed, allowing rain to enter the engine?