Yeah, it's only necessary to hold the oil in, not lift a battleship with the bolt!
I'll bet the "funny feeling" you had was that the bolt wouldn't "bottom out" like normal -- having cracked the fitting, you were extracting it!
Hope the repair wasn't too bad..... At least she stopped at once, no engine damage! I've got Mother trained, she reported that the oil pressure gauge read zero one day, but since the gas gauge and temp gauge did too, she could drive slowly home. Blown fuse.
1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!