Hey Furbie, I think you have this one wrong:
"they missed with the bomb but the giant explosion tipped it over."
They also hit it actually, 1 or 2, not sure.
Wil try to find the book I have about 617 and look it up
I think one explosion peeled of a 100 fet section of the deck like a can opener.
As for the Grand slam, it was used for the submarine bunkers, right? Penetrated some 7m of reinforced concrete. But also, the effect on built up areas was devastating, since blowing up deep into the ground created a mini earthquake of some strength that easily toppled buildings.