Well, I'm not at all sure what episode you guys are talking about.
But let me put my 2 cents worth in. When I used to work Intensive Care and assisted when temporary pacemakers were inserted (which require fluroscopy, a type of xray), I had to wear those darn aprons. I once had one on for 2 hours. And I can tell you they are HEAVY! But that has nothing to do with a lighter weight coat or apron. But if it wasn't as heavy as one of those aprons, I'm not thinking it would keep another Kryptonian from xraying Clark.
