Summary dismissal of appeal: appellate court may dismiss if no sufficient grounds, subject to hearing safeguards and record review. An appellate court may summarily dismiss an appeal when, on examining the petition and judgment, it finds no sufficient ground for interference, subject to safeguards requiring the appellant or advocate a reasonable opportunity to be heard, exceptions for frivolous appeals or disproportionate inconvenience of producing an accused in custody, and the lapse of the prescribed filing period; the court may call for the record and must record reasons in certain trial-level dismissals, and may, in the interests of justice, hear a related unconsidered ordinary appeal on behalf of the same appellant.