Bad Day, Very Bad day

Defiantly loss of pressure. The engine lost almost all power before I shut it down and I could hear the top end was starved for oil. It was still running but I HAD to get it off the main drag. (no where to pull off the road) I am thinking of just pulling the engine and opening it up and seeing if and how much damages there may be. Just cannot understand why one minute it was running fine and the next... 0 psi?????