I get that, you know, it's a television show, but replaying that death scene over and over made it painfully obvious that all that "stone" was made out of styrofoam.
Also, how contrived it was:
Honey, I don't feel safe standing under this 3-ton stone slab swinging precariously on a chain.
Nonsense woman, I need you standing right here by my side while we get this thing in place.
Spoofing that in the Wormhole X-Treme! episode was GOATed though.