Anyone ever have a freeze plug pop out??

Muswagon said
440, unknown age of last rebuild but my back yard build did not include new freeze plugs.

Finally got the Lokar trans cable working great and suddenly I see a huge trail behind me.

Coming from passenger side freeze plug area but header is in the way so cannot 100% confirm.

Weird...

Pop out? Yes. On my Super Bee. I was a half mile from the shop so I just drove it there. Damn those 383's are tough. Not much coolant left. I screwed in one of the expandable rubber ones. I wonder if it's still in there. LMAO