Harrison was involved in one of the most infamous blunders in the history of the NFL playoffs. In the 2003 NFL playoffs, Harrison, against the Denver Broncos, caught a 20 yard pass from Peyton Manning across the middle. Deltha O'Neal, the Broncos cornerback who now plays with the Cincinnati Bengals, had forgotten to touch Harrison down, and Harrison stood up and continued running, eventually scoring on a fifty-yard touchdown play. Broncos head coach Mike Shanahan was infuriated with O'Neal and the rest of the Broncos defenders that were around Harrison, who helped clinch victory as the Colts went up 28-3. Indianapolis would eventually win 41-10 in a blowout. Harrison would finish that game against Denver with 7 receptions for 133 yards and 2 touchdowns, in his finest post-season performance to date. It is currently his only 100 yard performance in a postseason game and the only time he ever scored a touchdown in the playoffs. In a recent episode of "The Top Five Reasons You Can't Blame" on ESPN Classic concerning the excessive celebrations of wide receiver Terrell Owens, former Buffalo Bills coach Marv Levy said this about Harrison: "Terrell Owens is a guy that has to go out there and get recognized for his antics and celebrations, while a guy like Marvin Harrison wants to be recognized for his play on the field, not his antics or celebrations. That's the kind of receiver you want on your team". Harrison lives in Huntingdon Valley, Pennsylvania, a suburb right outside of Philadelphia, his native city.
