discussed Cited "see, e.g." Kimble v. Duckworth See, e.g., United States v. Martinez, 604 F.2d 361 , reh. denied, 607 F.2d 1006 (5th Cir.), cert. denied, 444 U.S. 1034 , 100 S.Ct. 708 , 62 L.Ed.2d 671 (1979) (failure to object to trial judge’s decision to continue trial in defendant’s absence affirmed absent showing of plain error); United States v. Warme, 572 F.2d 57 (2d Cir.), cert. denied, 435 U.S. 1011 , 98 S.Ct. 1885 , 56 L.Ed.2d 393 (1978) (failure to object to trial judge’s decision to proceed in the defendant’s absence constitutes waiver for purposes of raising issue on appeal); United States v. Brown, 571 F.2d 980 (6th Cir.…