Comments on Weight of Evidence
i)    Tex:
(1)    Common when the judge rules on objections; you must object right then to preserve your error.  Then ask for comment to be stricken and get a jury instruction to disregard.
(2)    Reversible error?  Usually an instruction to the jury is sufficient to cure any error – would have to be pretty egregious to have reversible error.
ii)    Fed:  no rule on comments so has to be really bad; can’t become an advocate or show bias