Why did I spin a main bearing?

Check the pick up screen.....
In my early motor 360 I had a pick up screen that had a plastic button in the center of the screen.

Long story short.... A valve stem seal made its way into the oil pump and froze the pump up and sheered the oil drive shaft off at 75 mph..... I herd the valves start rattling, but by then it was too late...
So I feel your Pain Mopar brother......