That's what the rule says. You could otherwise use a block of wood with a wrist strap (so it comes off the table with your hand)This is how I interpret the rule that's being questioned. In that case, the bridge hand is not even being used, but just the mechanical bridge itself. When players use a standard bridge, those attached to a longish stick, your normal bridge hand can be a elevated a couple of feet on the end of the bridge stick. Personally, I think it means that you can't set your bridge hand on top of a mechanical bridge to elevate your hand bridge, and shoot that way. i think?