Huh,.. I didn't see this.
I'm sure that worked very well since his threads were just burried in the sand, that's the way I would have done it too,.. if I had a wooden spoon that is.
However, had he been ancored to the glass beneith the sand a move like that could damage the byassal gland since you would be pulling on the threads as Chris&Barb mentioned. If this were the case then the best way to do it would be to cut the threads that attach to the glass. He can grow the threads back, but if the gland itself is damaged it almost always leads to infection and death.
I've had to cut my clams off their mounts a couple of times,.. it's always important not to pull, but to cleanly slice the threads making sure not to cut the gland. Clams can also drop their byassal threads and "Jump ship" if their unhappy.
Glad your clam is doing well!
Whiskey
__________________
Mr. Jive/Dr. Heckyll
And you run and you run to catch up with the sun, but its sinking
racing around to come up behind you again