In criminal cases, plain error is governed by Crim. R. 52(B), which states: "Plain errors or defects affecting substantial rights may be noticed although they were not brought to the attention of the court." An alleged error "does not constitute a plain error ... unless, but for the error, the outcome of the trial clearly would have been otherwise." State v. Long (1978), 53 Ohio St.2d 91, 372 N.E.2d 804, paragraph two of the syllabus. The defendant bears the burden of demonstrating that a plain error affected his substantial rights. United States v. Olano (1993), 507 U.S. at 725,734, 113 S.Ct. 1770; State v. Perry (2004), 101 Ohio St.3d 118, 120 2004 Ohio 297, 802 N.E.2d 643, 646. Even if the defendant satisfies this burden, an appellate court has discretion to disregard the error and should correct it only to 'prevent a manifest miscarriage of justice.'" State v. Barnes (2002), 94 Ohio St.3d 21, 27, 2002 Ohio 68, 759 N.E.2d 1240, quoting State v. Long (1978), 53 Ohio St.2d 91, 372 N.E.2d 804, paragraph three of the syllabus. Perry, supra, at 118, 802 N.E.2d at 646. The Supreme Court has repeatedly admonished that this exception to the general rule is to be invoked reluctantly. "Notice of plain error under Crim. R. 52(B) is to be taken with the utmost caution, under exceptional circumstances and only to prevent a manifest miscarriage of justice." Id. at paragraph three of the syllabus. See, also, State v. Thompson (1987), 33 Ohio St. 3d 1, 10, 514 N.E.2d 407; State v. Williford (1990), 49 Ohio St.3d 247, 253, 551 N.E.2d 1279 (Resnick, J., dissenting).