Well..actually, BB...there is a boundary layer between the two, which is reflected in the truism that all we know of physics is derived from our observations (and the mathematical manipulations thereof).

If perception itself is a metaphysical phenomenon in the final analysis, as some belileve it is (not just stimulus response changes, but the actual perception at the end of the chain), why then, metaphysics may have something to say about physics. And phsyics starts digging into regions of metaphysical interest all the time, for example, when it posits that observation modifies outcome. Or that a singularity is the end point of Time. So I don't think the boundary between the two areas is as impermeable as all that! :D

A