Name this engine noise, can't be good!

to me; it sounds like from inside the oilpan, but not rods; and the one time I have heard that was when a rod was slapping the dipstick and bouncing it off the pan. It went away when I pulled the dipstick out with the engine running.

On a Chevy I have heard a worn out timing chain hit the tin cover but that was a bit different.

IDK; Time to drop the pan I guess